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.
onset oncet onside
inset unset sunset moonset onset lancet dynast boneset funnest censed sensed tensed keenest renest knesset gainst canst hygienist vainest hymnist leanest tannest tennist meanest finest unseat monist funest mensed oncet fainest pianist nest sanest rinsed soonest lensed honest dunnest tanist wannest