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.
griff griffe grief gruff gruffy grieve corf curf kerf
griff sheriff tariff riff rif ruff purify sharif brief terrify serif raff reif rife horrify gruff grief draff aerify griffe torrify verify sherif rarify shroff