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.
busyness business baseness bassness biasness bossiness booziness basins bisons bosons besnows bizones bioscience bosuns
busyness sissyness massiness foziness gassiness queasiness juiciness jazziness cosiness haziness sissiness noisiness newsiness lousiness ooziness mussiness raciness mossiness sassiness maziness siziness doziness wiseness cheesiness fuzziness laziness iciness piousness business gauziness laciness bassness biasness coziness bossiness booziness easiness nosiness niceness looseness muzziness rosiness mousiness sauciness messiness baseness fussiness dizziness wheeziness wooziness choiceness