validation vs proof

validation and proof both are nouns.

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

As nouns, validation and proof are synonyms defined as:

validation and proof: the act of validating; finding or testing the truth of something

Other synonyms of validation include substantiation.

As nouns, proof is a hypernym of validation; that is, proof is a word with a broader meaning than validation:

Other hypernyms of validation include cogent evidence.

validation (noun)	proof (noun)
the act of validating; finding or testing the truth of something	the act of validating; finding or testing the truth of something
the cognitive process of establishing a valid proof	a trial photographic print from a negative
	any factual evidence that helps to establish the truth of something
	a formal series of statements showing that if one thing is true something else necessarily follows from it
	(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)

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

validation (verb)	proof (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