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.
snail senile sunnily snell snool sonly zonal sanely xenial zanily zoonal zonally
nail toenail unnail snail renail tenail nil cannily lienal biennial binal anil biannual vinal funnily faunal hymnal sunnily loonily renal tinily penal hymeneal moonily manual penile pinnal rainily banal anneal xenial zonal denial venal cuneal phonily finale annual tonal venial zanily lineal tinnily tawnily hymenal noil nill nala bonnily anile final finial phonal hymenial canal anal veinal zoonal genial manila menial nounal penial pineal punily vineal annal senile biennale tineal shinily