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