Trending Inauguration Synonyms In English / An inauguration is a ceremony that formally marks the start of something. It can also refer to the process of introducing something into inauguration is most commonly used in the context of formal ceremonies. Inauguration Synonyms In English : Acceptance, cd, iou, john hancock, mo, ok, acceptance bill, acceptation, acception, accession, accord, acknowledgment, acquiescence, acquisition, adherence, admiration, admission, admittance, adoption.