Brunhild vs Brunnhilde

Brunhild and Brunnhilde both are nouns.

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

As nouns, Brunhild and Brunnhilde are synonyms defined as:

Brunhild and Brunnhilde: 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 Brynhild, Brynhildr.

Brunhild (noun)	Brunnhilde (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