neritic zone vs ocean bottom

neritic zone and ocean bottom both are nouns.

Word	Noun	Adjective	Verb	Adverb
neritic zone	Yes	No	No	No
ocean bottom	Yes	No	No	No

As nouns, ocean bottom is a hypernym of neritic zone; that is, ocean bottom 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
ocean bottom: the bottom of a sea or ocean

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

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