vacillant vs wavering

vacillant is not a noun while wavering is a noun.

Word	Noun	Adjective	Verb	Adverb
vacillant	No	Yes	No	No
wavering	Yes	Yes	No	No

As adjectives, vacillant and wavering are synonyms defined as:

Other synonyms of vacillant include vacillating.

vacillant (noun)	wavering (noun)
	the quality of being unsteady and subject to changes
	indecision in speech or action

vacillant (adjective)	wavering (adjective)
uncertain in purpose or action	uncertain in purpose or action