thank vs acknowledge

thank and acknowledge both are verbs.

Word	Noun	Adjective	Verb	Adverb
thank	No	No	Yes	No
acknowledge	No	No	Yes	No

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

Other hyponyms of thank include recognise, recognize.

thank (verb)	acknowledge (verb)
express gratitude or show appreciation to	accept as legally binding and valid
	accept (someone) to be what is claimed or accept his power and authority
	declare to be true or admit the existence or reality or truth of
	express obligation, thanks, or gratitude for
	report the receipt of
	express recognition of the presence or existence of, or acquaintance with