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.
marital maritally mortal martello mortally myrtle
marital ratal ritual aortal artal bridal brutal varietal virtual hartal cordial curtail curtal mortal parietal portal
mart married merit amrita smart smartie smarty