Excrement rhymes with:
increment, sacrament, detriment, experiment, increment, instrument, sacrament, temperament, adamant, argument, armament, complement, condiment, detriment, diamant, disarmament, element, experiment, filament, impediment, implement, increment, instrument, integument, ligament, ornament, orpiment, parliament, predicament, rearmament, regiment, sacrament, sediment, sentiment, supplement, temperament, tenement, testament, tournament, vehement