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.
wastery waster wastry waister wasterie wester wastrie wisteria wistaria
mastery wastery mystery booster keister waister zoster faster gustier nastier kiester coster foster lustier feistier chestier mustier laster caster jouster moister visiter vastier paster buster lister bustier ouster pastry yeastier wester toaster sister tester taster pestier duster diaster easter rester meister zester ghostier stroy ester roster royster master roister boaster poster bister hoister wrester mister keyster muster history nester feaster luster story stere leister estray steer roaster gaster keester rouster vestry jester fester missteer fustier heister astray vaster coaster juster masseter stray quester baster hastier mistier rustier aster xyster raster pastier austere diester piaster pester rooster wristier tastier testier toastier zestier waster destroy oyster wastry chaster dustier shyster yester