sanction vs imprimatur

sanction and imprimatur both are nouns.

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

As nouns, sanction and imprimatur are synonyms defined as:

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

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

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