Synonyms of the word

essential

• adj. Necessary.
• adj. Very important; of high importance.
• adj. (biology) necessary for survival but not synthesized by the organism, thus needing to be ingested.
• adj. Being in the basic form; showing its essence.
• adj. Really existing; existent.
• adj. (of a lamination of a 3-manifold) Such that each complementary region is irreducible, the boundary of…
• adj. (medicine) Idiopathic.
• n. A necessary ingredient.
• n. A fundamental ingredient.

all-important

• adj. Very important; vital or crucial.

basal

• adj. basic, elementary; relating to, or forming, the base, or point of origin.
• adj. (anatomy) associated with the base of an organism or structure.
• adj. (medicine) a minimal level that is necessary, such as a minimum dose of a drug.
• adj. (chiefly systematics) In a phylogenetic tree, being a group, or member of a group, which diverged earlier…
• n. base, bottom, minimum.
• n. (anatomy) Any basal structure or part.

biogenic

• adj. produced by living organisms, or by a biological process.
• adj. essential for the maintenance of life.

constituent

• adj. Being a part, or component of a whole.
• adj. Authorized to make a constitution.
• n. A part, or component of a whole.
• n. The person or thing which constitutes, determines, or constructs.
• n. A resident of a place represented by an elected official.
• n. (law) One who appoints another to act for him as attorney in fact.
• n. (grammar) A functional element of a phrase or clause.

constitutional

• adj. Relating to a legal or political constitution.
• adj. Conforming to a legal or political constitution.
• adj. Belonging to, or inherent in, the constitution, or in the structure of body or mind.
• adj. For the benefit of one's constitution or health.
• n. A walk that is taken regularly for good health and wellbeing.

constitutive

• adj. having the power or authority to constitute, establish or enact something.
• adj. having the power or authority to appoint someone to office.
• adj. extremely important, essential.
• adj. that forms a constituent part of something else.
• adj. (biochemistry) (of an enzyme) that is continuously produced at a constant rate.

crucial

• adj. Being essential or decisive for determining the outcome or future of something; extremely important.
• adj. (archaic) Cruciform or cruciate; cross-shaped.
• adj. (slang, chiefly Jamaica) Term of approval, particularly when applied to reggae music.

important

• adj. Having relevant and crucial value.

indispensable

• adj. (ecclesiastical, obsolete) Not admitting ecclesiastical dispensation; not subject to release or exemption;…
• adj. (of duties, rules etc.) Unbendable, that cannot be set aside or ignored.
• adj. Absolutely necessary or requisite; that one cannot do without.
• n. A thing that is not dispensable; a necessity.
• n. (in the plural, colloquial, dated) Trousers.

intrinsic

• adj. Innate, inherent, inseparable from the thing itself, essential.
• adj. (of a body part, relating to anatomy) Situated, produced, secreted in, or coming from inside an organ,…
• n. (computing, programming) A built-in function that is implemented directly by the compiler, without any…
• n. (video games) An ability possessed by a character and not requiring any external equipment.

intrinsical

• adj. intrinsic.

matter

• n. Substance, material.
• n. A condition, subject or affair, especially one of concern.
• n. An approximate amount or extent.
• n. (obsolete) The essence; the pith; the embodiment.
• n. (obsolete) Inducing cause or reason, especially of anything disagreeable or distressing.
• n. (dated) Pus.
• v. (intransitive) To be important.
• v. (transitive, obsolete outside dialects) To care about, to mind; to find important.
• v. To form pus or matter, as an abscess; to maturate.

must

• v. (modal auxiliary, defective) To do with certainty; indicates that the speaker is certain that the subject…
• v. (modal auxiliary, defective) To do as a requirement; indicates that the sentence subject is required as…
• n. Something that is mandatory or required.
• n. The property of being stale or musty.
• n. Something that exhibits the property of being stale or musty.
• n. Fruit juice that will ferment or has fermented, usually grapes.
• v. (transitive) To make musty.
• v. (intransitive) To become musty.
• n. A time during which male elephants exhibit increased levels of sexual activity and aggressiveness (also…
• n. An elephant in this sexual and aggressive state.

necessary

• adj. Required, essential, whether logically inescapable or needed in order to achieve a desired result or avoid…
• adj. Unavoidable, inevitable.
• adj. (obsolete) Determined, involuntary: acting from compulsion rather than free will.
• n. (Britain, archaic euphemistic, usually with the definite article) A place to do the "necessary" business…

necessity

• n. The quality or state of being necessary, unavoidable, or absolutely requisite.
• n. The condition of being needy; desperate need; lack.
• n. Something necessary; a requisite; something indispensable.
• n. Something which makes an act or an event unavoidable; an irresistible force; overruling power.
• n. The negation of freedom in voluntary action; the subjection of all phenomena, whether material or spiritual,…
• n. (law) Greater utilitarian good; used in justification of a criminal act.
• n. (law, in the plural) Indispensable requirements (of life).

no-frills

• adj. (idiomatic) basic or simple; providing only what is necessary, without anything extra or fancy.

organic

• adj. (biology) Pertaining to or derived from living organisms.
• adj. (physiology, medicine) Pertaining to an organ of the body of a living organism.
• adj. (chemistry) Relating to the compounds of carbon, relating to natural products.
• adj. (agriculture) Of food or food products, grown in an environment free from artificial agrichemicals, and…
• adj. (sociology) Describing a form of social solidarity theorized by Emile Durkheim that is characterized by…
• adj. (military) Of a military unit or formation, or its elements, belonging to a permanent organization (in…
• adj. Instrumental; acting as instruments of nature or of art to a certain destined function or end.
• adj. (Internet, of search results) Generated according to the ranking algorithms of a search engine, as opposed…
• adj. Developing in a gradual or natural fashion.
• adj. Harmonious; coherent; structured.
• n. (chemistry) An organic compound.
• n. An organic food.
• n. (science fiction) A living organism, as opposed to a robot or hologram.

primary

• adj. The first in a group or series.
• adj. Main; principal; placed ahead of others.
• adj. (geology) Earliest formed; fundamental.
• adj. (chemistry) Illustrating, possessing, or characterized by, some quality or property in the first degree;…
• adj. (medicine) Relating to the place where a disorder or disease started to occur.
• adj. (medicine) Relating to day-to-day care provided by health professionals such as nurses, general practitioners,…
• n. A primary election; a preliminary election to select a political candidate of a political party.
• n. The first year of grade school.
• n. A base or fundamental component; something that is irreducible.
• n. The most massive component of a gravitationally bound system.
• n. A primary school.
• n. (ornithology) Any flight feather attached to the manus (hand) of a bird.
• n. A primary colour.
• n. (electronics) A directly driven inductive coil, as in a transformer or induction motor that is magnetically…
• v. (US, intransitive) To take part in a primary election.
• v. (US, politics) To challenge an incumbent sitting politician for their political party's endorsement to…

requirement

• n. A necessity or prerequisite; something required or obligatory. Its adpositions are generally of in relation…
• n. Something asked.
• n. (engineering) A statement (in domain specific terms) which specifies a verifiable constraint on an implementation…

requisite

• adj. Essential, required, indispensable.
• n. An indispensable item; a requirement.

staple

• n. (now historical) A town containing merchants who have exclusive right, under royal authority, to purchase…
• n. (by extension) Place of supply; source.
• n. The principal commodity produced in a town or region.
• n. A basic or essential supply.
• n. A recurring topic or character.
• n. Short fiber, as of cotton, sheep’s wool, or the like, which can be spun into yarn or thread.
• n. Unmanufactured material; raw material.
• v. (transitive) To sort according to its staple.
• adj. Relating to, or being market of staple for, commodities.
• adj. Established in commerce; occupying the markets; settled.
• adj. Fit to be sold; marketable.
• adj. Regularly produced or manufactured in large quantities; belonging to wholesale traffic; principal; chief.
• n. A wire fastener used to secure stacks of paper by penetrating all the sheets and curling around.
• n. A wire fastener used to secure something else by penetrating and curling.
• n. A U-shaped metal fastener, used to attach fence wire or other material to posts or structures.
• n. One of a set of U-shaped metal rods hammered into a structure, such as a piling or wharf, which serve…
• n. (mining) A shaft, smaller and shorter than the principal one, joining different levels.
• n. A small pit.
• n. A district granted to an abbey.
• n. (obsolete) A post; prop; support.
• v. (transitive) To secure with a staple.

substance

• n. Physical matter; material.
• n. The essential part of anything; the most vital part.
• n. Substantiality; solidity; firmness.
• n. Material possessions; estate; property; resources.
• n. A form of matter that has constant chemical composition and characteristic properties.
• n. Drugs (illegal narcotics).
• n. (theology) Hypostasis.

substantial

• adj. Having a substance; actually existing.
• adj. Not seeming or imaginary; not illusive; real; solid; true; veritable.
• adj. Corporeal; material; firm.
• adj. Having good substance; strong; stout; solid; firm.
• adj. possessed of goods or an estate; moderately wealthy; responsible.
• adj. Large in size, quantity, or value; vastas.
• adj. Most important; essential.
• adj. Ample or full.
• adj. Significantly great.
• n. Anything having substance; an essential part.

substantive

• adj. Of the essence or essential element of a thing; as, "substantive information".
• adj. Having substance; enduring; solid; firm; substantial.
• adj. (law) Applying to essential legal principles and rules of right; as, "substantive law".
• adj. (chemistry) Of a dye that does not need the use of a mordant to be made fast to that which is being dyed.
• adj. Depending on itself; independent.
• adj. (grammar) Used like a noun substantive.
• adj. (military) (describing a rank or appointment) actually and legally held, as distinct from an acting, temporary…
• n. (grammar) A word that names a person, place, thing or idea; a noun (sensu stricto).
• v. (grammar) To make a word belonging to another part of speech into a substantive (that is, a noun).

thing

• n. That which is considered to exist as a separate entity, object, quality or concept.
• n. A word, symbol, sign, or other referent that can be used to refer to any entity.
• n. An individual object or distinct entity.
• n. (informal) Something that is normal or generally recognised.
• n. (law).
• n. (somewhat dated) The latest fad or fashion.
• n. (in the plural) Clothes, possessions or equipment.
• n. (informal) A unit or container, usually containing edible goods.
• n. (informal) A problem, dilemma, or complicating factor.
• n. (slang) A penis.
• n. A living being or creature.
• n. That which matters; the crux.
• n. Used after a noun to refer dismissively to the situation surrounding the noun's referent.
• n. (informal) That which is favoured; personal preference. (Used in possessive constructions.).
• n. (chiefly historical) A public assembly or judicial council in a Germanic country.
• v. (rare) To express as a thing; to reify.

unexpendable

• adj. Not expendable.

virtual

• adj. In effect or essence, if not in fact or reality; imitated, simulated.
• adj. Having the power of acting or of invisible efficacy without the agency of the material or measurable part;…
• adj. Nearly, almost. (A relatively recent corruption of meaning, attributed to misuse in advertising and media…
• adj. Simulated in a computer or online.
• adj. Operating by computer or in cyberspace; not physically present.
• adj. (computing, object-oriented programming, of a class member) Capable of being overridden with a different…
• adj. (physics) Pertaining to particles in temporary existence due to the Heisenberg uncertainty principle.
• n. (computing, programming) A virtual member function of a class.

vital

• adj. Relating to, or characteristic of life.
• adj. Necessary to the continuation of life; being the seat of life; being that on which life depends.
• adj. Invigorating or life-giving.
• adj. Necessary to continued existence.
• adj. Relating to the recording of life events.
• adj. Very important.
• adj. Containing life; living.
• adj. Capable of living; in a state to live; viable.