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.
crews cares cress cures craws cores cries crows creasy caress crease caries curies cressy creese cars curs cors cris cowries corries crus carries curries greys curse carse croze cruse cross grues gores corse carrs coirs crass grows currs craze grees course coarse crissa greasy cooers crouse cruise crosse curios quires grease coerce kyries kauries queries curious quaeres curiosa carouse carious kerries cuirass gurries carassow curassow quarries gars kirs kors kris
crews brews shrews trews res shores bores cores cares cowries herries diaries kerries cries serries ires wries areas meres morrows rows byres fries rees curries mares seeress harries farrows eyries rues brows raws presa haeres queries grees fores veeries heresy jerries cereus caries vires murries roes marries reis cures fairies phoresy frows peeress burrows furrows terries moires ureas narrows lyres purees sarees dowries tarries drees tries zaires tares heiress trues wearies wheres peres whirries wires chares chirres dairies chores yarrows duress sherries pores pries bourrees murres tires tories series ores gurries sires dries sorrows pares lores press berries grows paries cress soirees larees ferries quaeres tres rares zeroes dearies mures sirrees dress eyres ares perries pareos heroes boreas surreys fires caress crows nares mires quires brees lories grues durries faeries dories greys corries braws dares carries heres harrows gyres kyries hares bares marrows cires vireos furies quarries barres arrows fares lares braes prese hurries froes tarres aeries juries aures frees hires vrows buries pyres sores aureus borrows varies barrows craws gharries preys prows pareus serows bries gores lures draws hirees parries sauries tress trees ceres derries feres wherries nereis murreys dures curies sirees trows prees kauries wares whereas tyres peeries mores whores worries cherries choreas tores shares shires treys lorries seres yores
crew care core craw crow cure grew acre ocrea ocreae scree screw screwy