inaugural

nouns

an address delivered at an inaugural ceremony (especially by a United States president)

inaugural, inaugural address

the ceremonial induction into a position

"the new president obviously enjoyed his inauguration"

inaugural, inauguration

adjectives

occurring at or characteristic of a formal investiture or induction

"the President's inaugural address"; "an inaugural ball"

inaugural

antonym

exaugural

serving to set in motion

"the magazine's inaugural issue"; "the initiative phase in the negotiations"; "an initiatory step toward a treaty"; "his first (or maiden) speech in Congress"; "the liner's maiden voyage"

first, inaugural, initiative, initiatory, maiden