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.
chasmy chasm chiasm chiasma chiasmi shazam
chasmy seamy bosomy miasm miasma dismay chasm chiasm chiasma chiasmi
chase chasse cashews chais chaise chaos chaws chays chess chiaus chias chis chose hashes ichs cashaws cashes cashoos