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.
swear sawer sewar sewer sowar sower sware sweer seaware swore
rewear wear swear war beware cower weary aweary rawer pawer mower knower lower viewier fewer bowery hewer seaware sower beweary sewer weir dewar dower tawer tower twier chewer shewer showery bower sawer vower rower waur jowar weer power newer gnawer lowery ewer aware wair viewer cowier were ware wary sewar sowar sware sweer dewier dowery teaware towery chawer chewier shower showier