continental slope vs seabed

continental slope and seabed both are nouns.

Word	Noun	Adjective	Verb	Adverb
continental slope	Yes	No	No	No
seabed	Yes	No	No	No

As nouns, seabed is a hypernym of continental slope; that is, seabed is a word with a broader meaning than continental slope:

continental slope: the steep descent of the seabed from the continental shelf to the abyssal zone
seabed: the bottom of a sea or ocean

Other hypernyms of continental slope include Davy Jones's locker, Davy Jones, ocean bottom, ocean floor, sea bottom, sea floor.

continental slope (noun)	seabed (noun)
the steep descent of the seabed from the continental shelf to the abyssal zone	the bottom of a sea or ocean