cockscomb vs clotheshorse

cockscomb and clotheshorse both are nouns.

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

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

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

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

cockscomb (noun)	clotheshorse (noun)
the fleshy red crest on the head of the domestic fowl and other gallinaceous birds	a framework on which to hang clothes (as for drying)
a cap worn by court jesters; adorned with a strip of red	a man who is much concerned with his dress and appearance
a conceited dandy who is overly impressed by his own accomplishments
garden annual with featherlike spikes of red or yellow flowers