Fomorian vs Celtic deity

Fomorian and Celtic deity both are nouns.

Word	Noun	Adjective	Verb	Adverb
Fomorian	Yes	No	No	No
Celtic deity	Yes	No	No	No

As nouns, Celtic deity is a hypernym of Fomorian; that is, Celtic deity is a word with a broader meaning than Fomorian:

Fomorian: one of a group of Celtic sea demons sometimes associated with the hostile power of nature
Celtic deity: a deity worshipped by the Celts

Fomorian (noun)	Celtic deity (noun)
one of a group of Celtic sea demons sometimes associated with the hostile power of nature	a deity worshipped by the Celts