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.
drossy dross drowsy dressy duros dress duress tressy hydros drowse daresay hydrous dors drys doers dears dorsa trios trows deers truss taros trois durrs dures tress toros trass draws drees dares dorrs dries tyros duras troys druse doors drays tiros trousseau durras derris deairs torose douras torous triose dories hydras derays dearies derries diaries dourahs dowries durries hydrase dairies
drossy rosy drowsy dross prosy pross prissy morassy kaross gross gorsy brassy crosse cross cressy horsy frowsy brosy dressy grassy tressy