Synonyms of irregular in English:

irregular


See definition of irregular

adjective

1‘he had strong, irregular features’

SYNONYMS

asymmetrical, non-uniform, uneven, crooked, misshapen, lopsided, contorted, twisted

twisting, serpentine, curving

broken, jagged, ragged, craggy, serrated, sawtooth, saw-edged, notched, nicked, indented

ANTONYMS

regular, straight

2‘use sandpaper to smooth irregular surfaces’

SYNONYMS

rough, bumpy, uneven, coarse

pitted, rutted, rutty, holed, holey

lumpy, knobby, knobbly, gnarled

ANTONYMS

regular, smooth

3‘an irregular heartbeat’

SYNONYMS

inconsistent, unsteady, uneven, shaky, fitful, patchy, variable, varying, changeable, changing, ever-changing, on-and-off, off-and-on, inconstant, erratic, haphazard, unstable, unsettled, spasmodic, sporadic, episodic, intermittent, occasional, unpunctual, wavering, fluctuating, aperiodic, unsystematic, unmethodical, capricious

desultory, casual

ANTONYMS

regular, steady

4‘his appointment was most irregular’

SYNONYMS

against the rules, contrary to the rules, out of order, improper, incorrect, illegitimate, unscrupulous, unethical, unprofessional

unofficial, back-door, grey

not done, unacceptable, wrong, beyond the pale, unorthodox, unconventional, off-centre, abnormal

informal not on, a bit much, shady

British informal a bit thick, off, not cricket

NZ Australian informal over the fence

ANTONYMS

above board

5‘an irregular army’

SYNONYMS

guerrilla, underground

unofficial, paramilitary

resistance, partisan, mercenary

ANTONYMS

regular


noun

1‘scruffy, gun-toting irregulars refused to allow traffic through the town’

SYNONYMS

guerrilla, underground fighter

paramilitary

resistance fighter, partisan, mercenary

ANTONYMS

regular