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.
senarius scenarios senors snares sonars sceneries senores senoras seniors seiners sonorous sneers sinners sooners sunrays cinereous snores
senarius denarius nairus naris binaries canaries quinaries laniaries linearise hymnaries penurious scenarios
senarii senary scenario senor senora snare sonar