stipulate vs stipulatory

stipulate is not an adjective while stipulatory is an adjective.

Word	Noun	Adjective	Verb	Adverb
stipulate	No	No	Yes	No
stipulatory	No	Yes	No	No

stipulate (adjective)	stipulatory (adjective)
	constituted or contracted by stipulation or agreement

stipulate (verb)	stipulatory (verb)
specify as a condition or requirement in a contract or agreement; make an express demand or provision in an agreement
give a guarantee or promise of
make an oral contract or agreement in the verbal form of question and answer that is necessary to give it legal force