sea floor vs sea bottom

sea floor and sea bottom both are nouns.

Word	Noun	Adjective	Verb	Adverb
sea floor	Yes	No	No	No
sea bottom	Yes	No	No	No

As nouns, sea floor and sea bottom are synonyms defined as:

Other synonyms of sea floor include Davy Jones's locker, Davy Jones, ocean bottom, ocean floor, seabed.

sea floor (noun)	sea bottom (noun)
the bottom of a sea or ocean	the bottom of a sea or ocean