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.
farad fard faraday fraud fared faired feared fart ford frat freed fired fiord fried fordo foredo furred varied ferrate ferried variate gheraoed fort fret frit
farad rad heard eared irade rared caird grad card corrade byroad braid reread beard fared dread guard brad fraud hardy seared laird broad ward yaird tread sheared shard teared chared charade maraud sard pard trad oread pardy lardy tardy oared nard dared bread board raid bard hared hard bared karat tardo feared fard roared road barde garda cared grade carat reared geared read hoard soared arid lard pardi dorado neared orad tared liard pared parade trade sarod wared myriad chard shaird tirade shared tiaraed triad yard
far faerie faery fair fairy fare faro farrow fear fiar fora foray frae fray vara afar