commencement vs commencement ceremony

commencement and commencement ceremony both are nouns.

Word	Noun	Adjective	Verb	Adverb
commencement	Yes	No	No	No
commencement ceremony	Yes	No	No	No

As nouns, commencement and commencement ceremony are synonyms defined as:

commencement and commencement ceremony: an academic exercise in which diplomas are conferred

Other synonyms of commencement include commencement exercise, graduation, graduation exercise.

commencement (noun)	commencement ceremony (noun)
the act of starting something	an academic exercise in which diplomas are conferred
an academic exercise in which diplomas are conferred
the time at which something is supposed to begin