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.
spilt spoilt splat split spelt spiled sepiolite spieled speiled spilled spoiled spoliate sepaled spalled speeled spelled spooled suppled sepalled sepaloid supplied
spilt copilot uplit pilot plat plot applet caplet pelt couplet coplot replot ripplet spelt splat split spoilt chaplet
spile spill spail spale spall speil spell spiel splay spoil espial