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.
booster boaster baster bister buster bustier besetter bestir bistre bistro bestrew bestrow bistoury
booster foster roster zoster coster rooster poster zootier gustier bustier stere pester hastier roaster coaster faster souter feaster lustier fester mister caster royster aster sootier laster visiter nester vastier gaster rostra jester yeastier chestier wester waster toastier testier tastier dustier diester sister fustier zester boaster wrester master raster piaster kiester feistier meister keister zestier austere leister rester wristier ouster jouster bister mustier roister juster easter masseter ghostier pastier mystery muster nastier luster xyster keester mistier missteer moister quester keyster oyster lister rustier heister buster steer paster pestier mastery hoister baster vaster ester costar rouster diaster duster taster tester toaster waister wastery chaster shyster yester