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.
archer archery
reacher marcher richer breacher archer percher searcher lurcher broacher preacher trasher parachor harsher nourisher preachier treachery brusher rusher brasher crasher cherisher rushier brashier archery fresher brushier torchere marshier grouchier trashier trochar rasher torchier crusher reechier churchier