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.
nuclear knuckler knucklier niggler nigglier
clear nuclear chuckler tackler suckler sclera scalar cycler ocular claro clary buckler eclair facular fickler heckler hackler jocular cackler locular macular mickler knuckler piacular cyclery scaler secular declare tickler shackler