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.
pleases places pulses pluses palaces palsies plaices plisses plusses palliasses paillasses pelisses plazas polices palazzos policies pollices
leases releases pleases soleuses lases molasses glasses galleasses lasses leses liaises loesses paillasses malaises blesses palliasses valses ileuses classes clauses coleuses galliasses balases bolases aliases sleazes phyleses teleses
please pleas pales peals peles piles plays plews plies poles pules