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.
cent scent cento centu cenote centai sent sente senti scend seniti sennit sennet senate sienite send snit snot saint santo snoot snout suint
bent vent hent gent kent lent pent rent cent scent sent dent tent went shent