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.
sennit seniti sennet snit sent sienite scent sente senti sonnet senate sanity send snot cent saint scend snout centu santo snoot cento snide suint cenote centai seined sinned snooty snotty snouty sonata sunned zenaida
sennit nit seniti bonita sennet sanity rennet pinite binit linnet kainite lenite gunite nite bannet bennet sienite sonnet dunnite unite manitu bonito reunite kainit bonnet finito vanity jennet cannot gahnite finite gannet quinnat lenity manito mannite punnet knit snit dunite unit unity
senna sen scena scene seen seine sene sewn sienna sonny sunn sunna sunnah sunny