Adverb
1. O.K.
Adjective
1. all right, alright, all right
Noun
1. fine, ok, o.k., hunky-dory, satisfactory, O.K.
Verb
1. OK, okey, okeh, sanction, countenance, endorsement, indorsement, warrant, imprimatur, approve
1. O.K., sanction, authorize, authorise, pass, clear