I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
hydrous hydros hydras hydrase druse tyros duros dross torous douras drowse drossy drowsy dourahs drys dors duras taros drays dries dears truss dress tiros tours toros deers durrs trousseau troys drees dorsa dares trows tyres trois tahrs doors dorrs dures trues doers torus draws trios duress dressy triose torose dories deairs derris durras dairies dearies derries diaries dowries durries yttrias
hydrous vrouws rouse duros dross serious cerous porous parous grouse curious crouse carouse carious various roues furious ferrous ferreous aurous arouse rearouse cirrous serous druse hydros torous
hydro hydra hydrae hydria hydriae