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.
kegs cukes kagus keeks kikes kecks cokes cakes quakes kex cookies cookeys gawkies cogs gags quickies gucks gogos gawks cooks gowks kakas cocks kicks gooks kooks quags kakis
begs kegs legs megs negs pegs regs segs tegs