O.K. vs license

O.K. and license both are nouns.

Word	Noun	Adjective	Verb	Adverb
O.K.	Yes	No	Yes	Yes
license	Yes	No	Yes	No

O.K. (noun)	license (noun)
an endorsement	the act of giving a formal (usually written) authorization
	a legal document giving official permission to do something
	freedom to deviate deliberately from normally applicable rules or practices (especially in behavior or speech)
	excessive freedom; lack of due restraint

O.K. (verb)	license (verb)
give sanction to	authorize officially

O.K. (adverb)	license (adverb)
in a satisfactory or adequate manner