Belittle rhymes with:
littell, little, lyttle, acquittal, bittel, bittle, brittle, committal, hittle, it'll, kittel, kittell, kittle, knittel, knittle, littell, little, lyttle, noncommittal, pittle, pytel, rittle, skittle, smittle, spittle, tittel, tittle, transmittal, vittle, whittle, zittel
Belittle sounds like:
baldelli, baldly, belatedly, blithely, bloedel, boldly