Brunhild vs Brynhildr

Brunhild and Brynhildr both are nouns.

Word	Noun	Adjective	Verb	Adverb
Brunhild	Yes	No	No	No
Brynhildr	Yes	No	No	No

As nouns, Brunhild and Brynhildr are synonyms defined as:

Brunhild and Brynhildr: a Valkyrie or a queen in the Nibelungenlied who loved the hero Siegfried; when he deceived her she had him killed and then committed suicide

Other synonyms of Brunhild include Brunnhilde, Brynhild.

Brunhild (noun)	Brynhildr (noun)
a Valkyrie or a queen in the Nibelungenlied who loved the hero Siegfried; when he deceived her she had him killed and then committed suicide	a Valkyrie or a queen in the Nibelungenlied who loved the hero Siegfried; when he deceived her she had him killed and then committed suicide