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.
fogs fags figs fugs fugus focus fucous vogues fugues ficoes fucose fox vigs vugs foxy fakes fecks ficus fucks fucus fykes vagus vigas vuggs
biogs bogs fogs hogs jogs cogs logs mogs nogs dogs togs wogs shogs