Synthesizer rhymes with:
plasticizer, evilsizer, evilsizor, exerciser, hulsizer, plasticizer, advertiser, agrivisor, analyzer, anheuser, appetizer, atomizer, cafetizer, colonizer, compromiser, demonizer, energizer, equalizer, evilsizer, evilsizor, exerciser, fertilizer, franchiser, hulsizer, ionizer, ironizer, itemizer, lighthizer, merchandiser, mobilizer, moisturizer, nebulizer, organizer, oxidizer, plasticizer, polarizer, popularizer, rittereiser, stabilizer, sterilizer, supervisor, sympathizer, tranquilizer, wickizer, womanizer
Synthesizer sounds like:
schmitzer, schmotzer, schnetzer, schnitker, schnitzer, smetzer, snatcher, snedaker, snedegar, snedeker, snitker, snitzer