waffle vs vacillate

waffle is a noun but vacillate is not a noun.

Word	Noun	Adjective	Verb	Adverb
waffle	Yes	No	Yes	No
vacillate	No	No	Yes	No

As verbs, vacillate is a hyponym of waffle; that is, vacillate is a word with a more specific, narrower meaning than waffle:

waffle: pause or hold back in uncertainty or unwillingness
vacillate: be undecided about something; waver between conflicting positions or courses of action

Other hyponyms of waffle include dwell on, linger over, boggle, hover, linger, hover, oscillate, vibrate, falter, waver.

waffle (noun)	vacillate (noun)
pancake batter baked in a waffle iron

waffle (verb)	vacillate (verb)
pause or hold back in uncertainty or unwillingness	move or sway in a rising and falling or wavelike pattern
	be undecided about something; waver between conflicting positions or courses of action