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.
newsier nosier noisier nicer nooser
newsier messier sizer sassier pussier nosier hissier mousier lousier bossier queasier goosier gassier cosier dowser cheesier wowser hosiery hosier sieur wussier dossier sissier rosier osier noisier mussier mossier massier busier easier fussier hawser wiser choosier ser sir