corroboration vs certification

corroboration and certification both are nouns.

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

As nouns, corroboration and certification are synonyms defined as:

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

Other synonyms of corroboration include documentation.

corroboration (noun)	certification (noun)
confirmation that some fact or statement is true through the use of documentary evidence	the act of certifying or bestowing a franchise on
	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