Champion rhymes with:
campion, campion, olympian, appian, campion, caspian, ethiopian, fallopian, hagopian, homosapien, hovsepian, mississippian, olympian, rippeon, scorpion, slepian, stepien, thespian, utopian
Champion sounds like:
campana, campen, campion, campione, campopiano, canavan, cannavino, chambon, champine, champney, chombiono, cinnabon, cnnfn, combine, companhia, compania, companion, companionway, company, compean, confine, convene