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.
holt howlet hold hilt halt helot holed howled hallot halite holiday holyday holloed hollaed held holloaed hollooed haled halid
bolt volt holt jolt colt molt dolt
hole holey holla hollo holloa holloo hollow holly holy