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.
gnashed noshed niched notched
bashed quashed fashed lashed gnashed cashed hashed ashed dashed washed mashed pashed leashed sashed deashed gashed shed wooshed bushed ached beached dished reshoed fished poached coshed pushed coached moshed mushed shoed cached whooshed leached gushed pished wished bached tushed noshed shied lushed joshed roached hushed meshed peached reached cowshed rushed whished shushed