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.
sultan sultana suldan soldan saltine soliton celadon slidden slowdown
sultan litany melton molten platan platane soldan suldan sultana dalton
salt slaty souled slutty slut slot slitty slit slatey saltie slate slat silty silt sault salty sullied