certification vs corroboration

certification and corroboration both are nouns.

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

As nouns, certification and corroboration are synonyms defined as:

certification and corroboration: confirmation that some fact or statement is true through the use of documentary evidence

Other synonyms of certification include documentation.

certification (noun)	corroboration (noun)
the act of certifying or bestowing a franchise on	confirmation that some fact or statement is true through the use of documentary evidence
validating the authenticity of something or someone
confirmation that some fact or statement is true through the use of documentary evidence
a document attesting to the truth of certain stated facts