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.
retrial retral retrally redrill ruderal readerly
trial atrial retrial peytral sutural nitril guttural natural material littoral litoral literal lateral laetrile vitriol triol futural trill trawl trail mitral neutral nitrile petrale retral butyral notarial citral tutorial
retire retiree retore retro retry rewriter