Erroneous rhymes with:
acrimonious, antonius, felonious, harmonious, palonius, parsimonious, sanctimonious, thelonius, unceremonious, acrimonious, aeneas, aerolineas, antonius, bournias, contemporaneous, cyrenius, extraneous, felonious, fresenius, harmonious, homogeneous, igneous, ignominious, instantaneous, miscellaneous, morphonios, palonius, parsimonious, percutaneous, phineas, plinius, sanctimonious, simultaneous, spontaneous, thelonius, unceremonious, vilnius
Erroneous sounds like:
earning, earnings, earnings', earns, earnshaw, earring, earrings, erma's, ermis, erring, eyring