neritic zone vs sea bottom

neritic zone and sea bottom both are nouns.

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

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

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

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