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.
sonata senate zonate sonnet sinuate sent snit snot snoot snout suint senti scent sound sente sonde saint snouty sanity sennet centai snooty seniti snotty sundae sennit saunaed sienite zenaida
pinata sonata pineta ruinate senate binate antae anta neat pinnate nota nada quinnat manat menta panada enate zonate tannate quanta lanate pennate innate neonate manta lunate quinate qanat quinta gnat connate junta phonate phenate centai pinta hyphenate bonita donate yenta
son snaw sone sonny soon sown zona zonae