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.
ferrety ferret fretty ferity fret ferried ferrite ferrate forty fruity verity forrit feared furred variety fart vert fort frat frit fared fired fritt fruit freed vertu faired foredo veered verite faraday
ferrety barret ferret fretty variety carroty garret parroty pretty surety terret treaty turret ret