imitation vs takeoff

imitation and takeoff both are nouns.

Word	Noun	Adjective	Verb	Adverb
imitation	Yes	Yes	No	No
takeoff	Yes	No	No	No

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

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

Other hyponyms of imitation include mock-heroic, burlesque, lampoon, mockery, parody, pasquinade, put-on, send-up, sendup, spoof, travesty.

imitation (noun)	takeoff (noun)
copying (or trying to copy) the actions of someone else	a departure; especially of airplanes
something copied or derived from an original	humorous or satirical mimicry
the doctrine that representations of nature or human behavior should be accurate imitations	a composition that imitates or misrepresents somebody's style, usually in a humorous way
a representation of a person that is exaggerated for comic effect	the initial ascent of an airplane as it becomes airborne

imitation (adjective)	takeoff (adjective)
not genuine or real; being an imitation of the genuine article