cockscomb vs dude

cockscomb and dude both are nouns.

Word	Noun	Adjective	Verb	Adverb
cockscomb	Yes	No	No	No
dude	Yes	No	No	No

As nouns, dude is a hypernym of cockscomb; that is, dude is a word with a broader meaning than cockscomb:

cockscomb: a conceited dandy who is overly impressed by his own accomplishments
dude: a man who is much concerned with his dress and appearance

Other hypernyms of cockscomb include beau, clotheshorse, dandy, fashion plate, fop, gallant, sheik, swell.

cockscomb (noun)	dude (noun)
the fleshy red crest on the head of the domestic fowl and other gallinaceous birds	a man who is much concerned with his dress and appearance
a cap worn by court jesters; adorned with a strip of red	an informal form of address for a man
a conceited dandy who is overly impressed by his own accomplishments
garden annual with featherlike spikes of red or yellow flowers