Commendation rhymes with:
recommendation, fundacion, inundation, recommendation, foundation, fundacion, inundation, recommendation, accommodation, backwardation, consolidation, degradation, depredation, fluoridation, foundation, fundacion, gradation, intimidation, inundation, invalidation, liquidation, oxidation, predation, recommendation, retardation, sedation, trepidation, validation
Commendation sounds like:
camden, canadian, canadienne, candyman, canteen, cantin, cantina, canton, cantone, centanni, centeno, centime, centum, chandon, chinatown, cognition, comden, comedian, comedienne, comedown, committeeman, commotion, commutation, condemn, condition, condom, condominium, condon, condone, connotation, contain, contini, contino, continue, continuum, cosentino, countdown