Noun

• S: (n) flop, dud, washout (someone who is unsuccessful)
• S: (n) misfire, dud (an explosion that fails to occur)
• S: (n) 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"
• direct hypernym / inherited hypernym / sister term
• derivationally related form

Adjective

• S: (adj) dud (failing to detonate; especially not charged with an active explosive) "he stepped on a dud mine"