mutt vs feist

mutt and feist both are nouns.

Word	Noun	Adjective	Verb	Adverb
mutt	Yes	No	No	No
feist	Yes	No	No	No

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

Other hyponyms of mutt include fice, pariah dog, pie-dog, pye-dog.

mutt (noun)	feist (noun)
an inferior dog or one of mixed breed	a nervous belligerent little mongrel dog