waterfront vs seafront

waterfront and seafront both are nouns.

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

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

waterfront: the area of a city (such as a harbor or dockyard) alongside a body of water
seafront: the waterfront of a seaside town

Other hyponyms of waterfront include dockyard.

waterfront (noun)	seafront (noun)
the area of a city (such as a harbor or dockyard) alongside a body of water	the waterfront of a seaside town