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.
snotty snooty snouty snot snout snoot sanity sent snit suint saint sandy scent senti snood sente santo synod cenote senate seniti sennet sennit sonata sonnet sienite sinuate
knotty snotty gnatty natty netty nitty nutty snooty snouty