send-up vs impersonation

send-up and impersonation both are nouns.

Word	Noun	Adjective	Verb	Adverb
send-up	Yes	No	No	No
impersonation	Yes	No	No	No

As nouns, impersonation is a hypernym of send-up; that is, impersonation is a word with a broader meaning than send-up:

send-up: a composition that imitates or misrepresents somebody's style, usually in a humorous way
impersonation: a representation of a person that is exaggerated for comic effect

Other hypernyms of send-up include caricature, imitation.

send-up (noun)	impersonation (noun)
a composition that imitates or misrepresents somebody's style, usually in a humorous way	imitating the mannerisms of another person
	pretending to be another person
	a representation of a person that is exaggerated for comic effect