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.
scalier scaler sicklier scalar sclera squallier sclerae scalare scowler sculler suckler scullery squaller squealer cycler cyclery secular squalor
coalier scalier weaklier uglier squallier sicklier wrigglier gaoler scaler regaler coaler collier colliery galere caller recaller hacklier gigglier jigglier gogglier likelier knucklier nigglier gluier squaller squealer wagglier wigglier