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.
daresay dares dressy dearies dairies diaries dress dears drees dorsa dries tares drays dures dories drossy duress drowsy derays deairs tarres tressy derries dowries tarries durries tars dors drys tres doors trays durrs deers treys dross trues doers tarsi taros duras tahrs draws trews tores dorrs tires trees tyres tress tries tears druse duros hydros hydras tories durras derris douras drowse dourahs hydrase hydrous terries
resay daresay resaw foresaw phoresy hearsay heresy creasy cressy greasy presa dressy tressy res