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.
sundew sundae snide sonde sound sunned saunaed sned send sand scend sente saned sandy suint snood synod sained seined senate sonnet signed sennet sinned sienite sinuate
sundew nide undue unde duende fondue sonde reendow node nude anode bendee endow endue newt vendee vendue honeydew indie indow indue monde snide sundae denude dynode undee window
sun sauna sunn sunna sunnah sunny