top hat vs man's clothing

top hat and man's clothing both are nouns.

Word	Noun	Adjective	Verb	Adverb
top hat	Yes	No	No	No
man's clothing	Yes	No	No	No

As nouns, man's clothing is a hypernym of top hat; that is, man's clothing is a word with a broader meaning than top hat:

top hat: a man's hat with a tall crown; usually covered with silk or with beaver fur
man's clothing: clothing that is designed for men to wear

Other hypernyms of top hat include chapeau, hat, lid.

top hat (noun)	man's clothing (noun)
a man's hat with a tall crown; usually covered with silk or with beaver fur	clothing that is designed for men to wear