seacoast vs litoral

seacoast and litoral both are nouns.

Word	Noun	Adjective	Verb	Adverb
seacoast	Yes	No	No	No
litoral	Yes	No	No	No

As nouns, litoral is a hyponym of seacoast; that is, litoral is a word with a more specific, narrower meaning than seacoast:

Other hyponyms of seacoast include littoral, littoral zone, sands, landfall, seaboard, seaside, tideland.

seacoast (noun)	litoral (noun)
the shore of a sea or ocean	the region of the shore of a lake or sea or ocean