Synonyms of commencement in English:

commencement


See US English definition of commencement

See UK English definition of commencement

See Spanish definition of inicio

noun

1‘students shall enrol at the commencement of the academic session’

SYNONYMS
beginning, start, starting point, opening, outset, onset, launch, initiation, inception, birth, dawn, origin
day one
informal kick-off
ANTONYMS

conclusion