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.
quartet quartette quirted carted courted curated garoted guarded curtate graduate garotted garroted garreted curetted garrotted carded crated grated curded carotid cordate cordite created gradate greeted gritted grouted
quartet farted hearted carted marted parted darted tarted warted charted
quart quarte quarto quarried quirt squared