neritic zone vs sea floor

neritic zone and sea floor both are nouns.

Word	Noun	Adjective	Verb	Adverb
neritic zone	Yes	No	No	No
sea floor	Yes	No	No	No

As nouns, sea floor is a hypernym of neritic zone; that is, sea floor is a word with a broader meaning than neritic zone:

neritic zone: the ocean waters from the low tide mark to a depth of about 100 fathoms
sea floor: the bottom of a sea or ocean

Other hypernyms of neritic zone include Davy Jones's locker, Davy Jones, ocean bottom, ocean floor, sea bottom, seabed.

neritic zone (noun)	sea floor (noun)
the ocean waters from the low tide mark to a depth of about 100 fathoms	the bottom of a sea or ocean