okay vs confirm

okay is a noun but confirm is not a noun.

Word	Noun	Adjective	Verb	Adverb
okay	Yes	Yes	Yes	Yes
confirm	No	No	Yes	No

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

Other hyponyms of okay include sanctify, sanction, visa, back, endorse, indorse, plump for, plunk for, support, greenlight.

okay (noun)	confirm (noun)
an endorsement

okay (adjective)	confirm (adjective)
being satisfactory or in satisfactory condition

okay (verb)	confirm (verb)
give sanction to	make more firm
	establish or strengthen as with new evidence or facts
	strengthen or make more firm
	administer the rite of confirmation to
	support a person for a position

okay (adverb)	confirm (adverb)
in a satisfactory or adequate manner