Nouns

(n)O.K., OK, okay, okey, okehan endorsement“they gave us the O.K. to go ahead”

Verbs

(v)approve, O.K., okay, sanctiongive sanction to“I approve of his educational policies”

Adverbs

(r)okay, O.K., all right, alrightin a satisfactory or adequate manner“she'll do okay on her own”, “held up all right under pressure”