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.
dubious dubs daubs daubes dobies dobbies doobies dabs tubs debs dibs tabus tubes tubas doughboys debase tabbis taboos tibias tobies diabase tabbies
dubious rubious bios bouse bousy boubous gibbous niobous bis bos bus