Greek deity vs Pontos

Greek deity and Pontos both are nouns.

Word	Noun	Adjective	Verb	Adverb
Greek deity	Yes	No	No	No
Pontos	Yes	No	No	No

As nouns, Pontos is a hyponym of Greek deity; that is, Pontos is a word with a more specific, narrower meaning than Greek deity:

Greek deity: a deity worshipped by the ancient Greeks
Pontos: (Greek mythology) ancient personification of the sea; father of Nereus

Other hyponyms of Greek deity include Grace, forest god, satyr, silenus, Aether, Moirae, Moirai, Muse, Pontus, Rhadamanthus.

Greek deity (noun)	Pontos (noun)
a deity worshipped by the ancient Greeks	(Greek mythology) ancient personification of the sea; father of Nereus