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