shore vs seacoast

shore and seacoast both are nouns.

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

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

Other hyponyms of shore include lakeshore, lakeside, coast, sea-coast, seashore, strand.

shore (noun)	seacoast (noun)
a beam or timber that is propped against a structure to provide support	the shore of a sea or ocean
the land along the edge of a body of water

shore (verb)	seacoast (verb)
support by placing against something solid or rigid
arrive on shore
serve as a shore to