overpower vs overwhelm

overpower and overwhelm both are verbs.

Word	Noun	Adjective	Verb	Adverb
overpower	No	No	Yes	No
overwhelm	No	No	Yes	No

As verbs, overpower and overwhelm are synonyms defined as:

Other synonyms of overpower include overmaster.

As verbs, overpower and overwhelm are synonyms defined as:

overpower and overwhelm: overcome, as with emotions or perceptual stimuli

Other synonyms of overpower include overcome, overtake, sweep over, whelm.

overpower (verb)	overwhelm (verb)
overcome by superior force	charge someone with too many tasks
overcome, as with emotions or perceptual stimuli	overcome by superior force
	cover completely or make imperceptible
	overcome, as with emotions or perceptual stimuli