doubt vs waver

doubt and waver both are nouns.

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

doubt (noun)	waver (noun)
uncertainty about the truth or factuality or existence of something	the act of moving back and forth
the state of being unsure of something	the act of pausing uncertainly
	someone who communicates by waving

doubt (verb)	waver (verb)
consider unlikely	give off unsteady sounds, alternating in amplitude or frequency
lack confidence in	sway from side to side
	move or sway in a rising and falling or wavelike pattern
	move back and forth very rapidly
	move hesitatingly, as if about to give way
	pause or hold back in uncertainty or unwillingness
	be unsure or weak