see to it vs proof

see to it is not a noun while proof is a noun.

Word	Noun	Adjective	Verb	Adverb
see to it	No	No	Yes	No
proof	Yes	Yes	Yes	No

As verbs, proof is a hyponym of see to it; that is, proof is a word with a more specific, narrower meaning than see to it:

Other hyponyms of see to it include proofread, control, double-check, cross-check, cinch, card, spot-check, cover.

see to it (noun)	proof (noun)
	the act of validating; finding or testing the truth of something
	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)

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

see to it (verb)	proof (verb)
be careful or certain to do something; make certain of something	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