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.
suldan soldan sultan sultana slidden slowdown celadon saltine soliton xylidin xylidine
suldan soldan holden golden gulden milden olden sultan sialidan
sault sild sled slid slide sold soldi soldo souled sullied