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.
karst grist crust curst crest cariosity corset crista cruset crusty cresset goriest querist cristae caressed caroused creosote crosstie grisette queerest curiosity
karst arrest querist poorest merest prost curst barest crest rearrest purist serest horste jurist verset sourest dearest verste direst rust drest wrest tourist frost tryst airest worst aorist sheerest wrist roast rest sorest queerest nearest lyrist prest crust grist corset rarest purest searest horst hurst verist surest aurist verst diarist first dourest fairest durst forest trust burst worset breast wurst erst yarest
cars carse gars karoos kaross karroos kauries kauris kersey kirs kors kris