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.
senora senor senior snore seiner synura senary sunray senarii scenery synurae scenario saner sneer sonar sinner sneery sooner sunnier
senora nor tenor synura snore nori noria honor honour genera junior kinara noir manor menorah minor pawnor senior senor canoer sunray donor tenour
sen scena scene seen seine sene senna sewn sienna snow snowy