Synonyms of dud in English:

dud


See definition of dud

noun

1‘their new product turned out to be a complete dud’

SYNONYMS
failure, flop, let-down, disappointment
British damp squib
informal washout, lemon, loser, no-hoper, non-starter, dead loss, dead duck, lead balloon, fail
North American informal clinker
ANTONYMS

success


adjective

1‘a dud typewriter ribbon’

SYNONYMS
defective, faulty, unsound, inoperative, broken, broken-down, not working, not in working order, not functioning, malfunctioning, failed
informal bust, busted, kaput, on its last legs, conked out, done for
British informal duff, knackered
British vulgar slang buggered
ANTONYMS

in working order

2‘he payed with a dud £50 note’

SYNONYMS
counterfeit, fraudulent, forged, fake, faked, false, bogus, spurious
bad, invalid, worthless
informal phoney
ANTONYMS

genuine