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