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.
senti seniti sent sente scent senate centai sennit sennet send sienite snit snot cent centu suint snoot scend cento saint santo snout cenote sanity seined snooty snotty snouty sonata sonnet zenaida sand sned
senti anti menta kente kent leant gent genet coontie sente tent seniti dent tenty centu untie centai chianti rente shantih pent yenta lento inti vent tenet meant pantie bent bento lent vauntie vawntie feint hent tentie auntie sent tenuti scent went cento shanti cent shent rent yente
sen scena scene seen seine sene senna sewn sienna