acknowledge vs acknowledgeable

acknowledge is not an adjective while acknowledgeable is an adjective.

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

acknowledge (adjective)	acknowledgeable (adjective)
	capable of being acknowledged

acknowledge (verb)	acknowledgeable (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