Compare dud with other words:
duad vs. dud
dod vs. dud
dud vs. rud
dud vs. dur
dud vs. dup
dud vs. hud
dud vs. dux
dud vs. fud
dud vs. pud
dud vs. mud
dud vs. dun
cud vs. dud
bud vs. dud
dud vs. dude
dad vs. dud
dud vs. duo
dud vs. due
did vs. dud
dud vs. dug
dub vs. dud
dud vs. flop
dud vs. dummy
blank vs. dud
dud vs. duds
bomb vs. dud
dud vs. lottery
device vs. dud
dud vs. machine