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.
grues gores gurus grees greys grease greasy grouse crus gars gurries guars gorse gaurs grows grays cries gross cruse cress cares crews grace cures gorsy graze goers cores grass kurus caries creese cruise caress grassy queers crouse guiros crease kyries quires curies cressy creasy carouse queuers cowries carious carries kerries kauries curries corries queries curious quaeres quarries cars cors cris curs kirs kors kris
grues rues trues res gores hires bares kauries lures caress vireos ceruse meres virus bores mures fores cruse quires tarres diaries preys nereis caries sorus varus juries tress fairies cries eyres heresy buries fries treys tores cereus moires herries barres prees peeress duress brews cirrous dairies hares serries pareus murreys lories aureus mares quaeres furies ires cress aures ferrous ureas sires nairus hydrous dearies ruers truss zaires pareos wares whereas parous queries wherries whores worries cherries terries chirus chores shares shires prese shrews sarees truce surreys trees peres greys braes peruse purees dowries torous berries carries eyries porous corries gurries curies lares series druse feres seeress soirees heiress kurus phoresy aurous pyres presa dress ferries nares cerous perries hirees kerries haeres gyres heroes cures gharries press cares murres reis mores bourrees ares roues cores harries pores lores ceres vires crus dories boreas bries crews lorries grees varies gyrus gurus cirrus curries pries paries faeries veeries froes seres sauries larees rees fires hurries brees queuers lyres aeries quarries marries ores serous sirees tarries pares zeroes murries trews rares heres fares ruse suers tires parries dares dures sores roes cowries pursue praus byres tares jerries wries frees dries xerus cires tyres torus drees tries durries tories areas tres mires urus wearies derries sirrees wheres whirries wires chares peeries chirres choreas chorus sherries kyries shores yores
grue gore gree grew grey guru agree ogre