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.
centu cent cento scent cenote centai sent scend sente senti senate seniti sennet sennit sienite send snit snot
centu kente tent tendu senti sent bento rent menta cent meant mantua manitu lento lent yenta went leant kent cento shent tenty tenet dent sente scent rente bent pent feint vent hent genet gent yente