Norse deity vs Norn

Norse deity and Norn both are nouns.

Word	Noun	Adjective	Verb	Adverb
Norse deity	Yes	No	No	No
Norn	Yes	No	No	No

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

Norse deity: a deity worshipped by the ancient Norsemen
Norn: (Norse mythology) any of the three goddesses of destiny; identified with Anglo-Saxon Wyrd; similar to Greek Moirae and Roman Parcae

Other hyponyms of Norse deity include Aesir, Vanir, Nanna, weird sister, Sigyn, Ull, Ullr, Vali, Vidar, Vithar, Vitharr.

Norse deity (noun)	Norn (noun)
a deity worshipped by the ancient Norsemen	(Norse mythology) any of the three goddesses of destiny; identified with Anglo-Saxon Wyrd; similar to Greek Moirae and Roman Parcae