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.
sultry salutary solitary salter slater slitter slotter slatier siltier saltier saltire saluter slittier solidary zealotry sluttier soldiery sleetier zoolatry solitaire slider solder sledder soldier solider zoolater
paltry sultry peltry poultry toiletry alter zealotry realtor cluttery colter melter kultur kelter coulter jolter milter welter belter quilter altar bolter flattery moulter pelter realter salter solitary dilatory falter poulter aleatory salutary zoolatry glittery molter palter fluttery clattery vaulter halter philtra ultra jilter tilter philter kilter pellitory military filter lottery philtre helotry littery shelter
salt slaty souled slutty slut slot slitty slit slatey saltie slate slat silty silt sault salty sullied