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. Andrew Miller:

   To meet the huge challenge of feeding a burgeoning global population, using fewer resources, as our climate becomes increasingly unstable, we will need to use all of the tools at our disposal, be they social, political, economic or technological, regulatory reform is no longer merely an option, it is a necessity.

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. Jackie Rafter:

   We have people coming through our programs saying 'We are done. We do not want oil and gas jobs any more because it's too unstable'.

4. Operations Section Chief John Flannigan:

   Weather's really against us. It's going to be hot, it's going to be dry and air's going to be unstable which helps the heat raise faster, which brings in more air. All things that are negative for firefighters and positive for fire. So it's going to be a real battle today.

5. Bobby Bank/Getty:

   I was very unstable. I wasn’t thinking right. So I hooked up with these guys and all of a sudden I’m a stick-up artist. I stuck up every nightclub in New York, i’m no angel.