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.
bottom betime
bottom tom tomb tome toom atom atomy stoma zootomy diatom shittim
bott bot butte bout booty bootie bootee boot boite boat bitt bitty biota betta batty battue battu batteau bota batt butt butty