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.
rochet rachet ratchet recheat roached ruched reached retched reechoed wretched reshot rushed reshoed reshoot
fitchet rochet latchet hatchet rachet sachet ratchet cachet mooched beached touched licht coached pooched leeched ditched ouched etched batched wretched teched hotched waucht botched cached hutched echt poached hitched eched ruched douched tetched watched wecht latched chitchat niched witched cheat mouched pitched patched roached hatched itched matched chat recheat machete miched peached bached pouched chit fetched sheet ached bitched vouched reached retched peched notched leched couched leached outcheat letched yacht
rechew rich roach roshi rotch rotche rouche ruche arch archaea broche troche trochee