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.
spilled spiled speiled spalled spelled spieled spoiled sepalled suppled sepaled speeled spooled spilt supplied sepiolite spoilt sepaloid spoliate spelt splat split
pilled spilled spoiled spieled spelled speiled spalled sepalled repolled rappelled lapelled repelled cupelled appalled pulled polled piled spiled palled uppiled
spill spail spall speil spell spiel spile spoil