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.
lobar labara lobber lowbrow labor labra liber libra libri labour libber librae lubber
lobar bar dobra debar sober rebar labara kebar kabar kbar goober cobra fubar boar bear bare dobro
lob lobby lobe lobo looby lowboy alba blob glob globby globe slob slobby