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.
santol saintly sandal snootily snottily scintilla sinuately cental scintillae sendal centile snidely soundly sundial synodal
lintol santol cental hantle saintly riantly pontil pinitol phenetole gentil mental lentil quantal faintly fontal phenetol dental until mantel indol rental quaintly auntly gently jointly cantal cantle gauntly gentle quintal lintel mannitol mantle pentyl pintle entoil dentil wintle
santo sained saint sand sandy saned sanity saunaed sent sente senti snit snot snotty