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.
shirty shirt shorty short shaird cherty charity shortie sheroot shirred shred chert chart shard sherd shored shared shrewd shroud chaired chariot cheroot chirred choired sheared sheered shrewdie
dirty shirty arty variety fruity forty ferrety ferity parity borty party purty surety verity tarty airt weirdy virtu girt carroty gritty quirt lirot parroty purity rarity dirt dorty warty charity shirt hearty cherty shorty
shirr shire chiro chirr chirre chiru share sharia shariah sherry shier shore shrew shri ashier