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.
snot snout snoot snouty snotty snooty snit sent scent saint sente synod snood senti santo suint sanity sonata sonnet sennet cenote sennit senate seniti sienite sinuate send cent sand sned sandy saned scend snide sonde sound cento centu