Unstable Unstable synonyms changeable unstable and changeable unsteady unstable and unsteady volatile unstable and volatile shaky unstable and shaky inconstant unstable and inconstant precarious unstable and precarious variable unstable and variable erratic unstable and erratic fickle unstable and fickle wobbly unstable and wobbly Full list of synonyms (1665) Unstable antonyms stable unstable and stable steady unstable and steady constant unstable and constant firm unstable and firm certain unstable and certain strong unstable and strong unchanging unstable and unchanging sound unstable and sound sure unstable and sure reliable unstable and reliable Full list of antonyms (55) Share this picture Share this image Share this picture Share this image