substantiation vs proof

substantiation and proof both are nouns.

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

As nouns, substantiation and proof are synonyms defined as:

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

Other synonyms of substantiation include validation.

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

substantiation: additional proof that something that was believed (some fact or hypothesis or theory) is correct
proof: any factual evidence that helps to establish the truth of something

Other hypernyms of substantiation include cogent evidence.

substantiation (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
additional proof that something that was believed (some fact or hypothesis or theory) is correct	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)

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

substantiation (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