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.
rachet ratchet rochet reached recheat roached ruched 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
rash ratch reach rechew rich roach ruche arch archaea brach brachia orach orache trachea tracheae