Ionizer rhymes with:
colonizer, demonizer, organizer, womanizer, colonizer, demonizer, ironizer, organizer, womanizer, advertiser, agrivisor, analyzer, anheuser, appetizer, atomizer, cafetizer, colonizer, compromiser, demonizer, energizer, equalizer, evilsizer, evilsizor, exerciser, fertilizer, franchiser, hulsizer, ironizer, itemizer, lighthizer, merchandiser, mobilizer, moisturizer, nebulizer, organizer, oxidizer, plasticizer, polarizer, popularizer, rittereiser, stabilizer, sterilizer, supervisor, sympathizer, synthesizer, tranquilizer, wickizer, womanizer
Ionizer sounds like:
imagery, imcera, incisor, incur, ingar, inger, ingrao, ingria, injure, injury, inquire, inquirer, inquiry, inscore, insecure, inserra, inshore, insure, insurer, inzer