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.
rouster roster roister roaster rooster royster rustier rostra rester raster wrester resetter wristier ristra reciter resider restore
buster muster duster rouster jouster ouster luster juster souter feistier pester vaster moister laster lustra masseter lister baster bustier mistier master oyster wrester foster easter jester paster faster vastier mister keister zoster yeastier chestier wester waster toastier testier tastier dustier diester zester visiter royster sister quester leister fester coaster raster boaster roister ester nastier suiter pestier gaster rooster fustier rester roaster roster rustier steer stere mustier lustre coster bister keester ghostier heister mastery gustier poster piaster meister kiester pastier mystery keyster nester austere caster booster missteer lustier aster feaster wristier hoister zestier xyster diaster hastier taster tester toaster waister wastery chaster shyster yester
roust rust trustee prostie roast roost roset rosette roused rusty aroused frost frosty frusta crust crusty groused prost trust trusty