inaugural vs inauguration

inaugural and inauguration both are nouns.

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

As nouns, inaugural and inauguration are synonyms defined as:

inaugural (noun)	inauguration (noun)
the ceremonial induction into a position	the ceremonial induction into a position
an address delivered at an inaugural ceremony (especially by a United States president)	the act of starting a new operation or practice

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