certification vs authorization

certification and authorization both are nouns.

Word	Noun	Adjective	Verb	Adverb
certification	Yes	No	No	No
authorization	Yes	No	No	No

As nouns, authorization is a hypernym of certification; that is, authorization is a word with a broader meaning than certification:

Other hypernyms of certification include authorisation, empowerment.

certification (noun)	authorization (noun)
the act of certifying or bestowing a franchise on	the act of conferring legality or sanction or formal warrant
validating the authenticity of something or someone	the power or right to give orders or make decisions
confirmation that some fact or statement is true through the use of documentary evidence	official permission or approval
a document attesting to the truth of certain stated facts	a document giving an official instruction or command