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.
grid gride grit grad gored greed garda guard griot grade grody cried gourd caried greedy gritty gardai gourde garred carried queried curried querida corrida curd crit card grat crud cred grot quarried cord groat cared creed krait crowd curdy cured great crude cored credo grout grate caird greet
rid arid hybrid virid horrid irid jerid jerrid grid lurid murid sciurid hydrid torrid