Sweetser rhymes with:
amritsar, bautzer, blitzer, butzer, conatser, critser, croitzer, fetzer, fitzer, howitzer, katzer, meltzer, metzer, planitzer, pulitzer, schertzer, schmitzer, schwarzer, schweitzer, seltzer, setser, switzer, waltzer, wintzer, wurlitzer, zeltzer
Sweetser sounds like:
satcher, scheidecker, scheidegger, schweitzer, seducer, setser, setzer, shatzer, sight-seer, sightseer, sitzer, soothsayer, stachura, stacker, stager, stagger, staiger, staker, statzer, staudacher, stecher, stecker, stegar, steger, steiger, stetzer, sticker, stickier, stiger, stitzer, stocker, stoecker, stoeger, stoker, stucker, st_cyr, sweitzer, switcher, switzer