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.
dittany tetany titan detain titania detainee deaden tauten detinue duotone
dittany tawny attain botany buttony cottony litany muttony ratany rattan reattain tetany titan tan
dita ditto ditty vittate dittoed dit