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.
attend attendee attent attuned attained addend atoned attenuate addenda adenoid attaint autunite adnate audient
tend coattend attend kittened loudened rotund rattened potent patent mittened duende teind latent tendu tent ladened soddened stent detent whitened addend addenda attent battened deadened fattened neatened saddened reddened quietened pudenda stand pattened tautened hoidened hoydened maddened heightened leadened headend latened widened