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.
photons phytons phaetons phytins photoionize phytanes futons vodouns voudons voudouns voduns fatness fattens fitness
photons tons buttons futons phaetons phytons jetons codons cottons boutons muttons nitons putons rattons rhytons setons duotones moutons betons biotins cotans atones towns toons tonus tones jettons batons ketones mutons newtons pitons ratoons rattoons cytons stones chitons