Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun dud

3 senses of dud

Sense 1
flop, dud, washout -- (someone who is unsuccessful)
       => failure, loser, nonstarter, unsuccessful person -- (a person with a record of failing; someone who loses consistently)

Sense 2
misfire, dud -- (an explosion that fails to occur)
       => breakdown, equipment failure -- (a cessation of normal operation; "there was a power breakdown")

Sense 3
turkey, bomb, dud -- (an event that fails badly or is totally ineffectual; "the first experiment was a real turkey"; "the meeting was a dud as far as new business was concerned")
       => flop, bust, fizzle -- (a complete failure; "the play was a dismal flop")

Antonyms of adj dud

1 sense of dud

Sense 1
dud -- (failing to detonate; especially not charged with an active explosive; "he stepped on a dud mine")

INDIRECT (VIA unloaded) -> loaded -- ((of weapons) charged with ammunition; "a loaded gun")

Similarity of adj dud

1 sense of dud

Sense 1
dud -- (failing to detonate; especially not charged with an active explosive; "he stepped on a dud mine")
       => unloaded (vs. loaded) -- ((of weapons) not charged with ammunition; "many people are killed by guns thought to be unloaded")