contractor vs builder

contractor and builder both are nouns.

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

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

contractor: someone (a person or firm) who contracts to build things
builder: someone who contracts for and supervises construction (as of a building)

Other hypernyms of contractor include constructor.

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

contractor: (law) a party to a contract
builder: someone who contracts for and supervises construction (as of a building)

Other hyponyms of contractor include constructor.

contractor (noun)	builder (noun)
a bodily organ that contracts	someone who contracts for and supervises construction (as of a building)
someone (a person or firm) who contracts to build things	a person who creates a business or who organizes and develops a country
(law) a party to a contract	a substance added to soaps or detergents to increase their cleansing action
the bridge player in contract bridge who wins the bidding and can declare which suit is to be trumps