Doughnuts rhymes with:
donuts, donuts', donuts, donuts', cocoanuts, coconuts, donuts, donuts', groundnuts, hazelnuts, walnuts
Doughnuts sounds like:
dachshunds, desantiago, desantis, desantos, descends, descents, designates, desmids, disantis, discounts, dismutase, disseminates, dissents, docents, documents, dogmatic, dossantos