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.
seniti senti sennit snit sent sienite scent sente senate sanity sennet cent snot send cento suint snout snoot centu snide santo scend saint cenote centai seined snooty snotty snouty sonata sonnet zenaida
seniti nit bonito finito vanity vauntie vawntie inti finite coontie kainite gunite manitu knit senti snit dunnite tenuti unite untie shanti lenity pantie bonita pinite anti nite nidi gahnite kainit lenite auntie manito mannite sanity binit reunite sennit sienite dunite tentie unit unity chianti shantih
sen scena scene seen seine sene senna sewn sienna xenia seisin seizin