Synonyms of the word

valid

• adj. Well grounded or justifiable, pertinent.
• adj. Acceptable, proper or correct.
• adj. Related to the current topic, or presented within context, relevant.
• adj. (logic) Of a formula or system: such that it evaluates to true regardless of the input values.
• adj. (logic) Of an argument: whose conclusion is always true whenever its premises are true.

binding

• adj. Assigning something that one will be held to.
• adj. (of food) Having the effect of counteracting diarrhea.
• n. An item (usually rope, tape, or string) used to hold two or more things together.
• n. The spine of a book where the pages are held together.
• n. (sewing) A finishing on a seam or hem of a garment.
• n. (programming) The association of a named item with an element of a program.
• n. (programming) The interface of some library for the programming language other than one it is written…
• n. (chemistry) The action or result of making two or more molecules stick together.
• v. present participle of bind.

effectual

• adj. Producing the intended result; entirely adequate.

legal

• adj. Relating to the law or to lawyers.
• adj. Having its basis in the law.
• adj. Being allowed or prescribed by law.
• adj. (informal) Above the age of consent or the legal drinking age.
• n. (uncountable, informal) The legal department of a company.
• n. (uncountable, US, Canada) Paper in sheets 8½ in × 14 in (215.9 mm × 355.6 mm).
• n. (countable) A spy who is attached to, and ostensibly employed by, an embassy, military outpost, etc.

legitimate

• adj. In accordance with the law or established legal forms and requirements; lawful.
• adj. Conforming to known principles, or established or accepted rules or standards; valid.
• adj. Authentic, real, genuine.
• adj. Lawfully begotten, i.e., born to a legally married couple.
• adj. Relating to hereditary rights.
• n. A person born to a legally married couple.
• v. To make legitimate, lawful, or valid; especially, to put in the position or state of a legitimate person…

logical

• adj. (not comparable) In agreement with the principles of logic.
• adj. Reasonable.
• adj. (not comparable) Of or pertaining to logic.
• adj. (computing) Non-physical or conceptual yet underpinned by something physical or actual.

reasonable

• adj. Having the faculty of reason; imbued with reason; rational.
• adj. Just; fair; agreeable to reason.
• adj. Not excessive or immoderate; within due limits; proper.
• adj. Not expensive; fairly priced.
• adj. Satisfactory.

reasoned

• adj. based on reasoning; being the result of logical thought.
• v. simple past tense and past participle of reason.

sensible

• adj. (now dated or formal) Perceptible by the senses.
• adj. Easily perceived; appreciable.
• adj. (archaic) Able to feel or perceive.
• adj. (archaic) Liable to external impression; easily affected; sensitive.
• adj. Of or pertaining to the senses; sensory.
• adj. (archaic) Cognizant; having the perception of something; aware of something.
• adj. Acting with or showing good sense; able to make good judgements based on reason.
• adj. Characterized more by usefulness or practicality than by fashionableness, especially of clothing.
• n. (obsolete) Sensation; sensibility.
• n. (obsolete) That which impresses itself on the senses; anything perceptible.
• n. (obsolete) That which has sensibility; a sensitive being.

sound

• adj. Healthy.
• adj. Complete, solid, or secure.
• adj. (mathematics, logic) Having the property of soundness.
• adj. (Britain, slang) Good; acceptable; decent.
• adj. (of sleep) Quiet and deep. Sound asleep means sleeping peacefully, often deeply.
• adj. Heavy; laid on with force.
• adj. Founded in law; legal; valid; not defective.
• adv. Soundly.
• interj. (Britain, slang) Yes; used to show agreement or understanding, generally without much enthusiasm.
• n. A sensation perceived by the ear caused by the vibration of air or some other medium.
• n. A vibration capable of causing such sensations.
• n. (music) A distinctive style and sonority of a particular musician, orchestra etc.
• n. Noise without meaning; empty noise.
• v. (intransitive) To produce a sound.
• v. (copulative) To convey an impression by one's sound.
• v. (intransitive) To be conveyed in sound; to be spread or published; to convey intelligence by sound.
• v. (intransitive, obsolete) To resound.
• v. (intransitive, law, often with in) To arise or to be recognizable as arising in or from a particular area…
• v. (transitive) To cause to produce a sound.
• v. (transitive, phonetics, of a vowel or consonant) To pronounce.
• n. (geography) A long narrow inlet, or a strait between the mainland and an island; also, a strait connecting…
• n. The air bladder of a fish.
• n. A cuttlefish.
• v. (intransitive) Dive downwards, used of a whale.
• v. To ascertain, or try to ascertain, the thoughts, motives, and purposes of (a person); to examine; to try;…
• v. Test; ascertain the depth of water with a sounding line or other device.
• v. (medicine) To examine with the instrument called a sound or sonde, or by auscultation or percussion.
• n. (medicine) An instrument for probing or dilating; a sonde.
• n. A long, thin probe for sounding body cavities or canals such as the urethra.

unexpired

• adj. Not having expired.
• adj. Of food, still edible.
• adj. Of an agreement, coupon, or law, still in force.

validated

• v. simple past tense and past participle of validate.
• adj. Declared or made valid.
• adj. Having experienced emotional validation.

well-grounded

• adj. (of a person) Having extensive knowledge of a subject.
• adj. (of an argument etc) Based on good judgment and solid reasoning.