minstrel vs corner man

minstrel and corner man both are nouns.

Word	Noun	Adjective	Verb	Adverb
minstrel	Yes	No	Yes	No
corner man	Yes	No	No	No

As nouns, corner man is a hyponym of minstrel; that is, corner man is a word with a more specific, narrower meaning than minstrel:

minstrel: a performer in a minstrel show
corner man: a man at one end of line of performers in a minstrel show; carries on humorous dialogue with the interlocutor

Other hyponyms of minstrel include end man, interlocutor, middleman.

minstrel (noun)	corner man (noun)
a singer of folk songs	a man at one end of line of performers in a minstrel show; carries on humorous dialogue with the interlocutor
a performer in a minstrel show

minstrel (verb)	corner man (verb)
celebrate by singing, in the style of minstrels