waver vs vibrate

waver is a noun but vibrate is not a noun.

Word	Noun	Adjective	Verb	Adverb
waver	Yes	No	Yes	No
vibrate	No	No	Yes	No

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

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

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

waver (noun)	vibrate (noun)
the act of moving back and forth
the act of pausing uncertainly
someone who communicates by waving

waver (verb)	vibrate (verb)
give off unsteady sounds, alternating in amplitude or frequency	feel sudden intense sensation or emotion
sway from side to side	shake, quiver, or throb; move back and forth rapidly, usually in an uncontrolled manner
move or sway in a rising and falling or wavelike pattern	move or swing from side to side regularly
move back and forth very rapidly	sound with resonance
move hesitatingly, as if about to give way	be undecided about something; waver between conflicting positions or courses of action
pause or hold back in uncertainty or unwillingness
be unsure or weak