fop vs cockscomb

fop and cockscomb both are nouns.

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

As nouns, cockscomb is a hyponym of fop; that is, cockscomb is a word with a more specific, narrower meaning than fop:

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

Other hyponyms of fop include coxcomb, macaroni.

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