Synonyms of expletive in English:

expletive


See definition of expletive

noun

1‘she let out an expletive and slammed the phone down’

SYNONYMS
swear word, oath, curse, obscenity, profanity, epithet, imprecation, four-letter word, exclamation
bad language, foul language, strong language, swearing
informal dirty word
North American informal cuss word, cuss

2‘expletives are employed for the sake of the metre, not the sense’

SYNONYMS
filler, fill-in, stopgap, meaningless phrase, meaningless word, redundant phrase, redundant word, superfluous phrase, superfluous word, unnecessary phrase, unnecessary word