contractile organ vs contractor

contractile organ and contractor both are nouns.

Word	Noun	Adjective	Verb	Adverb
contractile organ	Yes	No	No	No
contractor	Yes	No	No	No

As nouns, contractile organ and contractor are synonyms defined as:

contractile organ (noun)	contractor (noun)
a bodily organ that contracts	a bodily organ that contracts
	someone (a person or firm) who contracts to build things
	(law) a party to a contract
	the bridge player in contract bridge who wins the bidding and can declare which suit is to be trumps