mussitate vs mumble

mussitate is not a noun while mumble is a noun.

Word	Noun	Adjective	Verb	Adverb
mussitate	No	No	Yes	No
mumble	Yes	No	Yes	No

As verbs, mussitate and mumble are synonyms defined as:

Other synonyms of mussitate include maunder, mutter.

mussitate (noun)	mumble (noun)
	a soft indistinct utterance

mussitate (verb)	mumble (verb)
talk indistinctly; usually in a low voice	talk indistinctly; usually in a low voice
	grind with the gums; chew without teeth and with great difficulty