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.
send scend seined sned sent sand saned sonde scent sandy senti synod sente snood sound seniti sundae sunned sained sinned sennet signed sundew sennit senate zenaida saunaed sienite snot snit cent snide snoot snout suint cento centu saint santo zoned
bend end fend fiend vend lend mend pend rend scend send tend wend shend