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.
altar alter aleatory allotter alder aulder
altar alter pelter palter molter quilter military belter bolter falter kilter filter philter solitary salter tilter realter welter poulter philtra philtre jolter paltry moulter milter kultur melter coulter colter kelter vaulter jilter halter salutary realtor sultry poultry ultra peltry shelter