seabed vs bottom

seabed and bottom both are nouns.

Word	Noun	Adjective	Verb	Adverb
seabed	Yes	No	No	No
bottom	Yes	Yes	Yes	No

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

Other hypernyms of seabed include bed.

seabed (noun)	bottom (noun)
the bottom of a sea or ocean	a cargo ship
	the fleshy part of the human body that you sit on
	the lower side of anything
	the lowest part of anything
	a depression forming the ground under a body of water
	low-lying alluvial land near a river
	the second half of an inning; while the home team is at bat

seabed (adjective)	bottom (adjective)
	situated at the bottom or lowest position
	the lowest rank

seabed (verb)	bottom (verb)
	come to understand
	strike the ground, as with a ship's bottom
	provide with a bottom or a seat