muscle vs contractor

muscle and contractor both are nouns.

Word	Noun	Adjective	Verb	Adverb
muscle	Yes	No	Yes	No
contractor	Yes	No	No	No

As nouns, contractor is a hypernym of muscle; that is, contractor is a word with a broader meaning than muscle:

Other hypernyms of muscle include contractile organ.

muscle (noun)	contractor (noun)
possessing muscular strength	a bodily organ that contracts
authority or power or force (especially when used in a coercive way)	someone (a person or firm) who contracts to build things
one of the contractile organs of the body	(law) a party to a contract
animal tissue consisting predominantly of contractile cells	the bridge player in contract bridge who wins the bidding and can declare which suit is to be trumps
a bully employed as a thug or bodyguard

muscle (verb)	contractor (verb)
make one's way by force