proof vs certification

proof and certification both are nouns.

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

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

Other hyponyms of proof include authentication, documentation, support, monetisation, monetization, probate.

proof (noun)	certification (noun)
the act of validating; finding or testing the truth of something	the act of certifying or bestowing a franchise on
a trial photographic print from a negative	validating the authenticity of something or someone
any factual evidence that helps to establish the truth of something	confirmation that some fact or statement is true through the use of documentary evidence
a formal series of statements showing that if one thing is true something else necessarily follows from it	a document attesting to the truth of certain stated facts
(printing) an impression made to check for errors
a measure of alcoholic strength expressed as an integer twice the percentage of alcohol present (by volume)

proof (adjective)	certification (adjective)
(used in combination or as a suffix) able to withstand

proof (verb)	certification (verb)
make resistant (to harm)
activate by mixing with water and sometimes sugar or milk
read for errors
knead to reach proper lightness
make or take a proof of, such as a photographic negative, an etching, or typeset