littoral vs coast

littoral and coast both are nouns.

Word	Noun	Adjective	Verb	Adverb
littoral	Yes	Yes	No	No
coast	Yes	No	Yes	No

As nouns, coast is a hypernym of littoral; that is, coast is a word with a broader meaning than littoral:

Other hypernyms of littoral include sea-coast, seacoast, seashore.

littoral (noun)	coast (noun)
the region of the shore of a lake or sea or ocean	the act of moving smoothly along a surface while remaining in contact with it
	the area within view
	the shore of a sea or ocean
	a slope down which sleds may coast

littoral (adjective)	coast (adjective)
of or relating to a coastal or shore region

littoral (verb)	coast (verb)
	move effortlessly; by force of gravity