Synonyms for unstable
ʌnˈsteɪ bəlun·sta·ble

WiktionaryRate these synonyms:5.0 / 1 vote

1. unstableadjective

   Synonyms:
   instable

   Antonyms:
   stable

2. unstableadjective

   having a strong tendency to change

   Synonyms:
   instable

   Antonyms:
   stable

3. unstableadjective

   fluctuating; not constant

   Synonyms:
   instable

   Antonyms:
   stable

4. unstableadjective

   fickle

   Synonyms:
   instable

   Antonyms:
   stable

5. unstableadjective

   unpredictable

   Synonyms:
   instable

   Antonyms:
   stable

6. unstableadjective

   Readily decompasable

   Synonyms:
   instable

   Antonyms:
   stable

7. unstableadjective

   Radioactive, especially with a short half-life

   Synonyms:
   instable

   Antonyms:
   stable

English Synonyms and AntonymsRate these synonyms:3.0 / 1 vote

1. unstable

   Uncertain is applied to things that human knowledge can not certainly determine or that human power can not certainly control; precarious originally meant dependent on the will of another, and now, by extension of meaning, dependent on chance or hazard, with manifest unfavorable possibility verging toward probability; as, one holds office by a precarious tenure, or land by a precarious title; the strong man's hold on life is uncertain, the invalid's is precarious.

   Synonyms:
   doubtful, dubious, equivocal, hazardous, insecure, perilous, precarious, risky, unassured, uncertain, unsettled, unsteady

   Antonyms:
   actual, assured, certain, firm, immutable, incontestable, infallible, real, settled, stable, steady, strong, sure, undeniable, undoubted, unquestionable

Princeton's WordNetRate these synonyms:3.0 / 1 vote

1. unstableadjective

   lacking stability or fixity or firmness

   "unstable political conditions"; "the tower proved to be unstable in the high wind"; "an unstable world economy"

   Synonyms:
   unsound, fluid, precarious, mentally ill

   Antonyms:
   sane, firm, easy, lasting, stabilised, stabilized, resolute, unreactive, stable, unfluctuating, stabile, steady, unchangeable

2. unstableadjective

   highly or violently reactive

   "sensitive and highly unstable compounds"

   Synonyms:
   unsound, fluid, precarious, mentally ill

   Antonyms:
   stabilized, lasting, firm, stabile, unchangeable, easy, stable, steady, stabilised, resolute, unreactive, sane, unfluctuating

3. precarious, unstableadjective

   affording no ease or reassurance

   "a precarious truce"

   Synonyms:
   mentally ill, perilous, parlous, precarious, shaky, touch-and-go, unsound, fluid

   Antonyms:
   stabilised, stable, lasting, unchangeable, unfluctuating, stabile, easy, stabilized, unreactive, steady, resolute, sane, firm

4. mentally ill, unsound, unstableadjective

   suffering from severe mental illness

   "of unsound mind"

   Synonyms:
   mentally ill, bad, unfit, fallacious, precarious, unsound, fluid

   Antonyms:
   steady, easy, unreactive, lasting, resolute, firm, stabilised, sane, stabile, stable, unfluctuating, unchangeable, stabilized

5. unstableadjective

   disposed to psychological variability

   "his rather unstable religious convictions"

   Synonyms:
   unsound, fluid, precarious, mentally ill

   Antonyms:
   resolute, lasting, sane, stabilized, unfluctuating, stabilised, stable, stabile, firm, unchangeable, steady, easy, unreactive

6. fluid, unstableadjective

   subject to change; variable

   "a fluid situation fraught with uncertainty"; "everything was unstable following the coup"

   Synonyms:
   mentally ill, mobile, liquid, fluent, runny, smooth, precarious, unsound, fluid

   Antonyms:
   firm, lasting, stable, stabile, resolute, steady, unfluctuating, unreactive, unchangeable, sane, easy, stabilised, stabilized

Dictionary of English SynonymesRate these synonyms:0.0 / 0 votes

1. unstableadjective

   Synonyms:
   UNSTEADY

Synonyms, Antonyms & Associated WordsRate these synonyms:0.0 / 0 votes

1. unstableadjective

   Synonyms:
   insecure, unsteady, irresolute, inconstant, erratic

PPDB, the paraphrase databaseRate these paraphrases:0.0 / 0 votes

1. List of paraphrases for "unstable":

   volatile, instability, unsettled, precarious, unsteady, shaky, fragile, destabilizing, uncertain, ever-shifting, labile, insecure, destabilization, stable, fluid

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How to use unstable in a sentence?

1. Bowen Pan:

   Hurricanes need relatively moist conditions and an unstable atmosphere, the Saharan Air Layer is a warm and dry layer that located about 15,000 feet high so basically that will introduce very dry and warm conditions in the north Atlantic, so that will create very stable and unfavorable conditions to hurricanes.

2. Jeb Bush:

   I think President Obama is being naive to trust the Ayatollahs and this deal will ultimately create an even more unstable Middle East.

3. Saint Jerome:

   An unstable pilot steers a leaking ship, and the blind is leading the blind straight to the pit. The ruler is like the ruled.

4. Georgy Murzin:

   After takeoff, birds got caught in the engines, with the left engine stalling immediately, then they got caught in the second engine and it became unstable, and also stalled. There wasn't enough thrust, and we lost altitude. We landed in a field manually -- the commander took control.

5. Marc Eckstein:

   One of our biggest challenges right now is getting our ambulances out of the emergency department, when our paramedics and EMTs transport a patient to an emergency department, there's a transfer of care that has to take place. Patients who are unstable or unable to be safely transferred to the waiting room or to a chair need a bed in the emergency department to be transferred to. And those beds are lacking right now.