apologize vs acknowledge

apologize and acknowledge both are verbs.

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

apologize (verb)	acknowledge (verb)
acknowledge faults or shortcomings or failing	accept as legally binding and valid
defend, explain, clear away, or make excuses for by reasoning	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