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.
quart quarte quarto quirt cart kart curt quarried curet court kurta guard karat carte carat caret karate garote quired curite carate carrot garret curate garrote queered querida curette garotte queried carroty garrotte card crit curd grat grit grot
quart art heart airt hart fart buret boart guard curet arty quarto mart party purty tarot tarty warty yurt hurt hearty carat quarte cart carte court curt karat kurta caret kart jurat quirt part peart dart tart wart chart yurta
quare quarry guar quaere query quire aquaria quackery quackier quaggier quaker quakier square