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.
afars affairs affaires affrays aviaries avers aivers averse avarice aphorise
afars zaffars sofars shofars quaffers zaffres differs affairs zaffers goffers lifers navars buffers varas vairs vars loafers whiffers offers kafirs chaufers varus puffers gauffers refers coffers roofers caviares furs fairs suffers chafers pharos reefers gofers duffers kaffirs knifers kefirs piaffers fares faros feoffers feuars fiars fears niffers fifers reoffers caviars hoofers gaffers safaris suffaris firs feoffors heifers zaffirs defers doffers wafers woofers chaffers chauffers shophars
afar affair affaire affray afire afore