acknowledge vs acknowledgment

acknowledge is not a noun while acknowledgment is a noun.

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

acknowledge (noun)	acknowledgment (noun)
	a statement acknowledging something or someone
	a short note recognizing a source of information or of a quoted passage
	the state or quality of being recognized or acknowledged

acknowledge (verb)	acknowledgment (verb)
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