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.
tress tressy tres tires trues trees trass tyres tares trews tries dress truss tores treys tories duress tarres dressy tors tars tarries terries tyros trows trice tears tiros truce torso trios tahrs tiers torse dross trays torrs trois torsi trace terce toros terse toras tarsi dares troys tours dures taros dries drees torus trousseau torous dories torahs terras triose tierce terais drossy torose durries diaries dearies daresay derries dairies terrace dowries yttrias dors drys
caress press peeress duress dress seeress cress tress heiress res crass quarries aeries fires byres eyries prees haeres phoresy reis morass prese buries corries hurries dures cressy larees sauries rues hares lorries harries mares tores pareus ceres berries brews gores peeries crews bourrees dearies barres terries meres furies ares rares lures tres purees braes murres greys vires mores priss pareos tressy treys trues dairies cereus tyres tarres diaries whereas durries wherries whores dowries worries cherries choreas fairies shares trass shires shrews zaires perries cowries sarees queries sirees roes heroes wries cures carries kyries harass bries wares gyres eyres murries fares ferries rees nereis sores curies hires lyres gurries bares aureus herries cires gross derries aures kauries mires brass heres marries tories cores peres parries varies brees preys heresy grues kaross caries hirees tires ires gharries fores feres jerries briss grees froes frees bores cross vireos lories cuirass drees frass juries series nares cries faeries dries sirrees fries grass dross pries quires pares dares paries ores presa lares cares quaeres tarries pyres kerries murreys lores moires surreys pores veeries mures curries boreas wearies dressy whirries zeroes trews tries truss tares areas ureas sires dories wheres trees pross wires soirees chares chirres chores seres sherries serries shores yores
tare tire tore tree trey true tyre strew