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.
hullo hulloa hulloo hull hallo hollo hillo hello halloo hollow hallow hilloa halloa holloo holloa hall haul hell halo hill helo hula helio holly hilly holla hallah hole hale hila howl heel hili holy heil hail heal
hullo fallow cully callow gully hollow alloy holloa lilo quill mallow hello hilloa hallo niello halloo mull pillow full cello foully sully fully dull fillo tallow fellow wallow follow shallow hulloo felloe bully mulla jello gull cull quell hull hulloa holloo lull quoll mellow hillo hollo halloa null allow hallow pull bellow sallow billow duello phyllo dully bull tulle bulla willow boulle yellow