Nouns

(n)seawardthe direction toward the sea

Adjectives

(a)offshore, seaward(of winds) coming from the land“offshore winds”
(s)seawarddirected or situated away from inland regions and toward the sea or coast“from the hill he took a seaward course”, “on the seaward side of the road”

Adverbs

(r)seaward, seawards, aseain the direction of the sea“the sailor looked seaward”