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.
steads steadies stades steeds stadias studs stets stats stoats states status studies statues statusy sedates studios studdies studious situates stots satieties stotts stouts setouts statice
buttheads steads deads steeds outadds hodads audads aoudads toads teats outeats tads deeds dads dados dadas stades teds duads doodads
stead steady estate sated seated sedate sited stade stadia stat staid state statue steed stet stied stoat osteoid