builder vs shipbuilder

builder and shipbuilder both are nouns.

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

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

builder: someone who contracts for and supervises construction (as of a building)
shipbuilder: a person who builds ships as a business

builder (noun)	shipbuilder (noun)
someone who contracts for and supervises construction (as of a building)	a business that builds and repairs ships
a person who creates a business or who organizes and develops a country	a person who builds ships as a business
a substance added to soaps or detergents to increase their cleansing action	a carpenter who helps build and launch wooden vessels