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.
drowse drowsy draws trows druse duros dross drossy triose torose hydros hydrous hydrase dowries dors drys deers doors dries toros duras trews troys terse dorsa dress drays doers trois durrs tiros dures dares tyros taros drees dorrs trios dears torse trousseau dressy torous deairs durras dories derays douras derris hydras duress dairies daresay dearies derries diaries dourahs durries
browse drowse narrows rose rouse frows ariose arose rows marrows morrows arouse grouse crows prose rearouse crosse cirrose carouse serows horse roose barrows torose triose worse vrows vrouws morose morse furrows arrows erose burrows farrows brose borrows brows grows sorrows gorse frowsy porose crouse prows corse rerose gyrose serosae harrows drowsy torse trows yarrows
dowry draw drew duro trow rowdier dowdier