sanction vs visa

sanction and visa both are nouns.

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

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

sanction: formal and explicit approval
visa: an endorsement made in a passport that allows the bearer to enter the country issuing it

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

As verbs, visa is a hyponym of sanction; that is, visa is a word with a more specific, narrower meaning than sanction:

Other hyponyms of sanction include sanctify, sanction, back, endorse, indorse, plump for, plunk for, support, confirm, greenlight.

sanction (noun)	visa (noun)
the act of final authorization	an endorsement made in a passport that allows the bearer to enter the country issuing it
a mechanism of social control for enforcing a society's standards
official permission or approval
formal and explicit approval

sanction (verb)	visa (verb)
give sanction to	provide (a passport) with a visa
give religious sanction to, such as through an oath	approve officially
give authority or permission to