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.
salutary saluter solitary sultry salter saltier saltire zealotry sluttier solidary solitaire slater slatier slitter siltier slotter sleetier slittier soldiery zoolatry slider solder
salutary military poultry solitary sultry
salute salt slut saltie salty sault slutty solute