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.
pleaches plashes plushes polishes
laches pleaches loaches leaches bleaches fleches goulashes cultches clutches liches cliches caleches filches halachas leeches belches mulches lyches fletches lychees clachs flashes slatches zilches guilloches clashes laichs leches plashes klatches lashes glitches culches cloches blotches letches lichees gulches calashes caliches latches flitches leashes fleeches slashes slouches welches