gnome vs Andvari

gnome and Andvari both are nouns.

Word	Noun	Adjective	Verb	Adverb
gnome	Yes	No	No	No
Andvari	Yes	No	No	No

As nouns, Andvari is a hyponym of gnome; that is, Andvari is a word with a more specific, narrower meaning than gnome:

gnome: a legendary creature resembling a tiny old man; lives in the depths of the earth and guards buried treasure
Andvari: (Norse mythology) a dwarf who possessed a treasure that was stolen by Loki

Other hyponyms of gnome include Nibelung.

gnome (noun)	Andvari (noun)
a short pithy saying expressing a general truth	(Norse mythology) a dwarf who possessed a treasure that was stolen by Loki
a legendary creature resembling a tiny old man; lives in the depths of the earth and guards buried treasure