dockyard vs waterfront

dockyard and waterfront both are nouns.

Word	Noun	Adjective	Verb	Adverb
dockyard	Yes	No	No	No
waterfront	Yes	No	No	No

As nouns, waterfront is a hypernym of dockyard; that is, waterfront is a word with a broader meaning than dockyard:

dockyard: an establishment on the waterfront where vessels are built or fitted out or repaired
waterfront: the area of a city (such as a harbor or dockyard) alongside a body of water

dockyard (noun)	waterfront (noun)
an establishment on the waterfront where vessels are built or fitted out or repaired	the area of a city (such as a harbor or dockyard) alongside a body of water