sanction vs O.K.

sanction and O.K. both are nouns.

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

As nouns, O.K. is a hyponym of sanction; that is, O.K. is a word with a more specific, narrower meaning than sanction:

Other hyponyms of sanction include OK, okay, okeh, okey, visa, nihil obstat.

As verbs, sanction and O.K. are synonyms defined as:

Other synonyms of sanction include approve, okay.

As verbs, O.K. is a hypernym of sanction; that is, O.K. is a word with a broader meaning than sanction:

Other hypernyms of sanction include approve, okay, sanction.

sanction (noun)	O.K. (noun)
the act of final authorization	an endorsement
a mechanism of social control for enforcing a society's standards
official permission or approval
formal and explicit approval

sanction (verb)	O.K. (verb)
give sanction to	give sanction to
give religious sanction to, such as through an oath
give authority or permission to

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