Synonyms of fail

1 Syllable

wane, tire, welch, fall, fold, lag, shrunk, shrank, miss, droop, flop, shrink, conk, slip

2 Syllables

weaken, conked, busted, idled, flounder, mistook, drooped, tucker, founder, abort, fizzling, fizzled, sagging, misread, conking, ceasing, sagged, omit, tuckers, fainting, fainted, languish, blunder, cease, slighted, inched, waned, fagging, flagged, swagging, weakens, ceased, four-flush, welches, lagged, fizzle

3 Syllables

collapsed, backlashed, backlashing, miscarry, atrophying, weakening, backfire, misreading, rebated, collapsing, languishes, ignore, ignoring, aborting, ignored, backfiring, disenchant, decline, backfired, backslide, aborted, disappoint, languished, rebating

4 Syllables

misbehaving, disenchanting, misconceived, misconceive, overstraining, misconceiving, misbehaved, disregarded, malfunctioned, misunderstand, misconducting, pejorate, disregarding, misbehave, misconducted

5 Syllables

deteriorate, deteriorating