proviso vs stipulation

proviso and stipulation both are nouns.

Word	Noun	Adjective	Verb	Adverb
proviso	Yes	No	No	No
stipulation	Yes	No	No	No

As nouns, stipulation is a hypernym of proviso; that is, stipulation is a word with a broader meaning than proviso:

proviso: a stipulated condition
stipulation: an assumption on which rests the validity or effect of something else

Other hypernyms of proviso include condition, precondition.

proviso (noun)	stipulation (noun)
a stipulated condition	a restriction that is insisted upon as a condition for an agreement
	an assumption on which rests the validity or effect of something else
	(law) an agreement or concession made by parties in a judicial proceeding (or by their attorneys) relating to the business before the court; must be in writing unless they are part of the court record