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.
clamp clomp clump clumpy glumpy
lamp clamp taillamp limp lump blimp flump clomp clump plump rollmop slump shlump
clam clammy calami calm claim climb clime clomb culm glam