prepare vs preparatory

prepare is not an adjective while preparatory is an adjective.

Word	Noun	Adjective	Verb	Adverb
prepare	No	No	Yes	No
preparatory	No	Yes	No	No

prepare (adjective)	preparatory (adjective)
	preceding and preparing for something

prepare (verb)	preparatory (verb)
make ready or suitable or equip in advance for a particular purpose or for some use, event, etc
undergo training or instruction in preparation for a particular role, function, or profession
create by training and teaching
arrange by systematic planning and united effort
prepare for eating by applying heat
to prepare verbally, either for written or spoken delivery
lead up to and soften by sounding the dissonant note in it as a consonant note in the preceding chord
educate for a future role or function