okey vs endorsement

okey and endorsement both are nouns.

Word	Noun	Adjective	Verb	Adverb
okey	Yes	No	No	No
endorsement	Yes	No	No	No

As nouns, endorsement is a hypernym of okey; that is, endorsement is a word with a broader meaning than okey:

Other hypernyms of okey include countenance, imprimatur, indorsement, sanction, warrant.

okey (noun)	endorsement (noun)
an endorsement	the act of endorsing
	formal and explicit approval
	a promotional statement (as found on the dust jackets of books)
	a speech seconding a motion
	a signature that validates something