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.
ratchet rachet rochet reached recheat retched roached wretched ruched reechoed rushed reshoed
hatchet latchet fitchet ratchet witched tetched notched sachet hotched rochet machete recheat pitched latched rachet itched patched hutched etched cachet retched bitched batched cheat letched matched fetched outcheat botched hitched wretched hatched ditched watched chitchat
ratch reach retch roach rotch rotche brach brachia cratch orach orache trachea tracheae