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.
slouches sloshes slushes slatches slashes zilches salchows silesias
slouches lushes caliches flushes fleches fletches blotches bleaches blushes lyches belches lychees mulches gulches plushes glitches latches culches zilches cloches loaches laches leeches clutches cliches caleches fleeches flitches leaches leches filches liches letches lichees pleaches klatches slatches guilloches slushes cultches welches