Synonyms for (adjective) erratic

Synonyms: mercurial, erratic, fickle, quicksilver

Definition: liable to sudden unpredictable change

Usage: erratic behavior; fickle weather; mercurial twists of temperament; a quicksilver character, cool and willful at one moment, utterly fragile the next

Similar words: changeable, changeful

Definition: such that alteration is possible; having a marked tendency to change

Usage: changeable behavior; changeable moods; changeable prices


Synonyms: temperamental, erratic

Definition: likely to perform unpredictably

Usage: erratic winds are the bane of a sailor; a temperamental motor; sometimes it would start and sometimes it wouldn't; that beautiful but temperamental instrument the flute- Osbert Lancaster

Similar words: undependable, unreliable

Definition: not worthy of reliance or trust

Usage: in the early 1950s computers were large and expensive and unreliable; an undependable assistant


Synonyms: erratic, planetary, wandering

Definition: having no fixed course

Usage: an erratic comet; his life followed a wandering course; a planetary vagabond

Similar words: unsettled

Definition: not settled or established

Usage: an unsettled lifestyle