Synonyms of erratic in English:

erratic


See definition of erratic

adjective

1‘can you explain his swings of mood, his erratic behaviour?’

SYNONYMS
unpredictable, inconsistent, changeable, variable, inconstant, uncertain, irregular, unstable, turbulent, unsteady, unsettled, unreliable, undependable, changing, ever-changing, volatile, varying, shifting, fluctuating, fluid, mutable, protean, fitful, wavering, full of ups and downs, peaky
mercurial, capricious, whimsical, fickle, flighty, giddy, impulsive, wayward, temperamental, highly strung, excitable, moody
informal blowing hot and cold
technical labile
rare fluctuant, changeful
ANTONYMS

predictable, consistent