Synonyms of the word

unstable

• adj. Having a strong tendency to change.
• adj. Fluctuating; not constant.
• adj. Fickle.
• adj. Unpredictable.
• adj. (chemistry) Readily decomposable.
• adj. (physics) Radioactive, especially with a short half-life.
• v. (transitive) To release (an animal) from a stable.

changeable

• adj. Capable of being changed.
• adj. Subject to sudden or frequent changes.

changeful

• adj. (rare) Changing frequently; very susceptible to change; variable; fickle.

coseismal

• adj. Of or pertaining to a line on a map connecting places simultaneously affected by a seismic event.

coseismic

• adj. During an earthquake.
• adj. coseismal.

crank

• adj. (slang) strange, weird, odd.
• adj. sick; unwell; infirm.
• adj. (nautical, of a ship) Liable to capsize because of poorly stowed cargo or insufficient ballast.
• adj. Full of spirit; brisk; lively; sprightly; overconfident; opinionated.
• n. A bent piece of an axle or shaft, or an attached arm perpendicular, or nearly so, to the end of a shaft…
• n. The act of converting power into motion, by turning a crankshaft.
• n. (archaic) Any bend, turn, or winding, as of a passage.
• n. (informal) An ill-tempered or nasty person.
• n. A twist or turn of the mind; caprice; whim; crotchet; also, a fit of temper or passion.
• n. (informal, Britain, dated in US) A person who is considered strange or odd by others. They may behave…
• n. (informal) An advocate of a pseudoscience movement.
• n. (US, slang) methamphetamine.
• n. (rare) A twist or turn in speech; a conceit consisting in a change of the form or meaning of a word.
• n. (obsolete) A sick person; an invalid.
• n. (slang) penis.
• v. (transitive) To turn by means of a crank.
• v. (intransitive) To turn a crank.
• v. (intransitive, of a crank or similar) To turn.
• v. (transitive) To cause to spin via other means, as though turned by a crank.
• v. (intransitive) To act in a cranky manner; to behave unreasonably and irritably, especially through complaining.
• v. (intransitive) To be running at a high level of output or effort.
• v. (intransitive, dated) To run with a winding course; to double; to crook; to wind and turn.

cranky

• adj. (obsolete) Weak, unwell.
• adj. (of a machine, etc.) Not in good working condition; shaky.
• adj. Grouchy, irritable; easily upset.
• adj. Not in perfect mental working order; eccentric, peculiar.
• adj. (archaic) Full of spirit; spirited.

explosive

• n. Explosive substance.
• adj. With the capability to, or likely to, explode.
• adj. Having the character of an explosion.
• adj. (slang) Easily driven to anger, usually with reference to a person.

fluid

• n. Any substance which can flow with relative ease, tends to assume the shape of its container, and obeys…
• adj. (not comparable) Of or relating to fluid.
• adj. In a state of flux; subject to change.
• adj. Moving smoothly, or giving the impression of a liquid in motion.
• adj. (of an asset) Convertible into cash.

impermanent

• adj. Not permanent; momentary.

inconstant

• adj. Not constant; wavering.

insane

• adj. Exhibiting unsoundness or disorder of mind; not sane; mad; deranged in mind; delirious; distracted.
• adj. Used by, or appropriated to, insane persons.
• adj. Causing insanity or madness.
• adj. Characterized by insanity or the utmost folly; ridiculous; unpractical.

irresolute

• adj. Undecided or unsure how to act.
• adj. Indecisive or lacking in resolution.

precarious

• adj. (comparable) Dangerously insecure or unstable; perilous.
• adj. (law) Depending on the intention of another.
• adj. (dentistry) Relating to incipient caries.

reactive

• adj. that reacts or responds to a stimulus.
• adj. (chemistry) that readily takes part in reactions.
• adj. (electronics) Characterized by induction or capacitance rather than resistance.
• adj. Reacting to the past rather than anticipating the future, not predictive.

rickety

• adj. Of an object: not strong or sturdy, as because of poor construction or upkeep; not safe or secure; giddy;…
• adj. Of a person: feeble in the joints; tottering.
• adj. Affected with or suffering from rickets.

rocky

• adj. Unstable; easily rocked.
• adj. In the style of rock and roll music.
• adj. (figuratively) Troubled; or difficult; in danger or distress.
• adj. Full of, or abounding in, rocks; consisting of rocks.
• adj. Like a rock.
• adj. (figuratively) Not easily impressed or affected; hard; unfeeling; obdurate; as, a rocky bosom.

seismal

• adj. seismic.

seismic

• adj. Related to, or caused by an earthquake or other vibration of the Earth.
• adj. (figuratively) Of very large, or widespread effect.

shaky

• adj. Shaking or trembling.
• adj. Nervous; Anxious.
• adj. (of wood) Full of shakes or cracks; cracked.
• adj. Easily shaken; tottering; unsound.

temporary

• adj. Not permanent; existing only for a period or periods of time.
• adj. Existing only for a short time or short times; transient, ephemeral.
• n. One serving for a limited time; short-term employee.

tender

• adj. Sensitive or painful to the touch.
• adj. Easily bruised or injured; not firm or hard; delicate.
• adj. Physically weak; not able to endure hardship.
• adj. (of food) Soft and easily chewed.
• adj. Sensible to impression and pain; easily pained.
• adj. Fond, loving, gentle, sweet.
• adj. Adapted to excite feeling or sympathy; expressive of the softer passions; pathetic.
• adj. Apt to give pain; causing grief or pain; delicate.
• adj. (nautical) Heeling over too easily when under sail; said of a vessel.
• adj. (obsolete) Exciting kind concern; dear; precious.
• adj. (obsolete) Careful to keep inviolate, or not to injure; used with of.
• v. (now rare) To make tender or delicate; to weaken.
• v. To feel tenderly towards; to regard fondly.
• n. (obsolete) Regard; care; kind concern.
• n. The inner flight muscle (pectoralis minor) of poultry.
• n. (obsolete) Someone who tends or waits on someone.
• n. (rail transport) A railroad car towed behind a steam engine to carry fuel and water.
• n. (nautical) A naval ship that functions as a mobile base for other ships.
• n. (nautical) A smaller boat used for transportation between a large ship and the shore.
• v. (formal) To offer, to give.
• v. to offer a payment, as at sales or auctions.
• n. A means of payment such as a check or cheque, cash or credit card.
• n. (law) A formal offer to buy or sell something.
• n. Any offer or proposal made for acceptance.

tippy

• adj. (obsolete, colloquial or slang) Fashionable, tip-top.
• adj. (obsolete, colloquial or slang, absolute, with the) In the height of fashion, excellent, cool.
• adj. (colloquial or slang) Clever, neat, smart.
• adj. Of tea, having a large amount of tips, or leaf buds.
• n. (obsolete, colloquial or slang) A dandy.
• adj. (Canada, US) Tending to tip or tilt over; unstable.

tipsy

• adj. slightly drunk, fuddled, staggering, foolish as a result of drinking alcoholic beverages.
• adj. (metonymically) unsteady, askew.

top-heavy

• adj. having a high centre of gravity, and liable to topple.
• adj. (of an organization) having an excessive number of administrators or managers.

tottering

• adj. Unsteady, precarious or rickety.
• adj. Unstable, insecure or wobbly.
• v. present participle of totter.
• n. The movement of one who totters.

uneasy

• adj. (rare) Not easy; difficult.
• adj. Restless; disturbed by pain, anxiety.
• adj. Not easy in manner; constrained; stiff; awkward; not graceful.
• adj. Causing discomfort or constraint.

unsound

• adj. Not sound, particularly.

unsteady

• adj. Not held firmly in position, physically unstable.
• adj. Noted for lack of regularity or uniformity.
• adj. Inconstant in purpose, or volatile in behavior.
• v. To render unsteady, removing balance.

volatile

• adj. (physics) evaporating or vaporizing readily under normal conditions.
• adj. (of a substance, informal) explosive.
• adj. (of a price etc) variable or erratic.
• adj. (of a person) quick to become angry or violent.
• adj. fickle.
• adj. temporary or ephemeral.
• adj. (of a situation) potentially violent.
• adj. (computing, of a variable) having its associated memory immediately updated with any changes in value.
• adj. (computing, of memory) whose content is lost when the computer is powered down.
• adj. (obsolete) Passing through the air on wings, or by the buoyant force of the atmosphere; flying; having…
• n. A chemical or compound that changes into a gas easily.

volcanic

• adj. (geology, planetology) of or pertaining to a volcano or volcanoes.
• adj. (geology, planetology) produced by a volcano, or, more generally, by igneous agencies.
• adj. (geology, planetology) changed or affected by the heat of a volcano.
• adj. (figuratively) reminiscent of a volcano; explosive, violent, full of suppressed anger, energy etc.
• n. A volcanic rock.

wobbly

• adj. Unsteady and tending to wobble.
• n. (US, labor union) Alternative spelling of Wobbly.
• n. (Britain, slang) A wobbler; a fit of rage.

wonky

• adj. Lopsided, misaligned or off-centre.
• adj. (chiefly Britain, Australia, New Zealand) Feeble, shaky or rickety.
• adj. (computing, especially Usenet) Suffering from intermittent bugs; broken.
• adj. Generally incorrect.
• n. A subgenre of electronic music employing unstable rhythms, complex time signatures, and mid-range synths.
• adj. Technically worded, in the style of jargon.