house-builder vs builder

house-builder and builder both are nouns.

Word	Noun	Adjective	Verb	Adverb
house-builder	Yes	No	No	No
builder	Yes	No	No	No

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

house-builder: someone who builds houses as a business
builder: someone who contracts for and supervises construction (as of a building)

Other hypernyms of house-builder include constructor.

house-builder (noun)	builder (noun)
someone who builds houses as a business	someone who contracts for and supervises construction (as of a building)
	a person who creates a business or who organizes and develops a country
	a substance added to soaps or detergents to increase their cleansing action