Commencement rhymes with:
advancement, announcement, announcment, enhancement, financement, pronouncement, advancement, announcement, announcment, assessment, basement, bemusement, debasement, disbursement, displacement, embarrassment, emplacement, endorsement, enforcement, engrossment, enhancement, enticement, financement, harassment, impressment, inducement, osment, outplacement, placement, pronouncement, reassessment, reimbursement, reinforcement, replacement, retracement
Commencement sounds like:
cincinnati, cognizant, cognoscenti, commissioned, conjoined, consent, consented, consequent, consigned, consignment, consonant, consumed, consummate, consummated