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.
cliches caliches cloches culches caleches clutches cultches glitches clachs clashes gulches calashes klatches guilloches galoshes goloshes goulashes
liches caliches cliches loaches mulches gulches glitches culches cloches laichs leeches filches latches leaches leches lichis polishes slatches zilches letches laches fleeches caleches belches clutches pleaches klatches lyches guilloches lychees slouches relishes cultches flitches lichees fletches fleches blotches bleaches welches
cliche caliche clach cloche culch