road builder vs builder

road builder and builder both are nouns.

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

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

road builder: someone whose business is to build roads
builder: someone who contracts for and supervises construction (as of a building)

Other hypernyms of road builder include constructor.

road builder (noun)	builder (noun)
someone whose business is to build roads	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