sanction vs endorsement

sanction and endorsement both are nouns.

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

As nouns, sanction and endorsement are synonyms defined as:

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

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

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