certification vs authentication

certification and authentication both are nouns.

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

As nouns, certification and authentication are synonyms defined as:

certification and authentication: validating the authenticity of something or someone

certification (noun)	authentication (noun)
the act of certifying or bestowing a franchise on	validating the authenticity of something or someone
validating the authenticity of something or someone	a mark on an article of trade to indicate its origin and authenticity
confirmation that some fact or statement is true through the use of documentary evidence
a document attesting to the truth of certain stated facts