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.
steals stales stalls steles steels stellas steelies seatless stills styles stools stoles stulls stylus sotols stiles seidels settles sedulous seedless sodaless stoolies setulous sidles saddles stylise stylize setulose
deals steals ideals teals totals cattalos steels rituals buddleias botels telos delis betels bedells deles deils dals dials teles buttals chattels medals catalos hotels metals models mutuals outtells pedals radials ratels redials retells seidels stalls details dales dells dahls stales steles ratals bedels rattails pedalos petals motels mutuels medials modals cattails coattails duals wedels tels dottels talus retails tells teels talls tales boatels talas tails taels dels vitals duels yodels
steal setal stale stall steel steelie steely stela stelae stelai stele stella osteal