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.
breacher broacher brasher brashier brusher brochure brushier
reacher broacher preacher breacher parachor treachery marcher torchier lurcher searcher grouchier percher reechier crasher richer rasher preachier brasher torchere archery trasher archer churchier
breach brach brachia breech broach abrachia