inauguration vs startup

inauguration and startup both are nouns.

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

As nouns, inauguration and startup are synonyms defined as:

inauguration and startup: the act of starting a new operation or practice

inauguration (noun)	startup (noun)
the ceremonial induction into a position	the act of starting a new operation or practice
the act of starting a new operation or practice	the act of setting in operation