inaugural vs initiatory

inaugural is a noun but initiatory is not a noun.

Word	Noun	Adjective	Verb	Adverb
inaugural	Yes	Yes	No	No
initiatory	No	Yes	No	No

As adjectives, inaugural and initiatory are synonyms defined as:

Other synonyms of inaugural include first, initiative, maiden.

inaugural (noun)	initiatory (noun)
the ceremonial induction into a position
an address delivered at an inaugural ceremony (especially by a United States president)

inaugural (adjective)	initiatory (adjective)
occurring at or characteristic of a formal investiture or induction	serving to set in motion
serving to set in motion