gagman vs comedian

gagman and comedian both are nouns.

Word	Noun	Adjective	Verb	Adverb
gagman	Yes	No	No	No
comedian	Yes	No	No	No

As nouns, comedian is a hypernym of gagman; that is, comedian is a word with a broader meaning than gagman:

gagman: a comedian who uses gags
comedian: a professional performer who tells jokes and performs comical acts

Other hypernyms of gagman include comic.

gagman (noun)	comedian (noun)
someone who writes comic material for public performers	a professional performer who tells jokes and performs comical acts
a comedian who uses gags	an actor in a comedy