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.
laster lister luster leister lustier listeria lustra lustre
aster fester roister poster zoster rester raster keester taster ouster xyster boaster paster shyster juster jouster oyster booster rooster royster waister foster lister nester caster bister diester zester sister keister master kiester vaster hoister yester chaster toaster quester keyster feaster muster rouster buster baster roaster heister easter meister ester wester moister roster diaster wrester jester waster pester coaster faster duster gaster coster luster mister leister laster tester piaster maestri seater lustra questor ghostier stere lustier mystery gazetteer pestier zootier hastier pastor nestor fustier wastery costar vastier yeastier chestier citer bustier rustier besetter mistier bistro resetter sitter pastry missteer quaestor lustre austere dustier stir vestry daystar bestir suiter zestier wristier steer pastier maestro piastre astir bistre mustier souter castor masseter mastery feistier wastry ristra rostra star visiter sootier testier sistra toastier gustier reciter nastier tastier setter
last list clast lassoed lawsuit leased least lest lased lost listee lust lusty blast blastie blasty classed glassed