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.
chard chared chaired charade charred shard chord chart shared chored shaird choired cheered chariot sheared choroid chirred churred charity choreoid chorioid shred sherd chert shroud cherty shrewd shored cheroot sheered shirred tiaraed shrewdie
hard shard chard sherd feared guard sard soared fared hardy pard rared pardy roared neared sarod shared yaird heard lard tardo cared tared hoard ward caird farad arid chart shaird liard fard barde seared hared herd beard board bared pardi reared pared bard card eared laird dared lardy tardy garda teared geared wared chared chord nard hart oared sheared shred yard
char charro charry chary chare charr chair ochreae cherry ochre chiro sharia chore share chiru churro chirr chirre shariah chorea ochrea churr ochry