Greek deity vs Pontus

Greek deity and Pontus both are nouns.

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

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

Greek deity: a deity worshipped by the ancient Greeks
Pontus: (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, Pontos, Rhadamanthus.

Greek deity (noun)	Pontus (noun)
a deity worshipped by the ancient Greeks	an ancient region of northern Asia Minor on the Black Sea; it reached its height under Mithridates VI but was later incorporated into the Roman Empire
	(Greek mythology) ancient personification of the sea; father of Nereus