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.
didst dadaist deadest dotiest tidiest deediest dottiest dowdiest duettist detest doughtiest tattiest tattooist
midst didst footiest jettiest gnattiest pettiest lutist autist headset cattiest matiest bawdiest adust odist pottiest doughiest hootiest reddest ruttiest deadest dost modest batiste haughtiest rattiest zootiest baddest nuttiest shittiest dowdiest chutist woodiest judoist widest weediest ruddiest tidiest tattiest goutiest rootiest nettiest dottiest nattiest sadist moodiest feudist nudest lewdest seediest dust quietist muddiest battiest giddiest meatiest peatiest bittiest bedsit knottiest faddist gaudiest guttiest oddest dadaist voodooist haddest fideist hadst readiest deist beadiest mitiest leadiest maddest rudest hoodiest faddiest headiest loudest nudist modiste nittiest pietist sootiest saddest poutiest sawdust neediest doughtiest fattiest reediest rowdiest tattooist wadset deediest whitiest wittiest dotiest chattiest shadiest duettist shoddiest
dads didies didoes didos diodes dits ditsy duds