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.
spline sepaline seaplane spleen cipolin spelean spleeny splenia splenii spelaean zeppelin cipollino
hipline topline pipeline sepaline tapeline opaline spline plane towplane pillion lupulin zeppelin capellini cipollino poplin caplin apolune cipolin biplane plain deplane capelin seaplane paulin chaplain
spail spale spall speil spell spiel spile spill splay spoil espial