endorsement vs sanction

endorsement and sanction both are nouns.

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

As nouns, endorsement and sanction are synonyms defined as:

Other synonyms of endorsement include countenance, imprimatur, indorsement, warrant.

endorsement (noun)	sanction (noun)
the act of endorsing	the act of final authorization
formal and explicit approval	a mechanism of social control for enforcing a society's standards
a promotional statement (as found on the dust jackets of books)	official permission or approval
a speech seconding a motion	formal and explicit approval
a signature that validates something

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