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.
hallo halloo hallow halloa hall halo hello hullo hollo hillo hilloa hollow hulloo holloo holloa hulloa hallah haul helo hull hale hail heal hell hill holly helio haole holla hilly hole holy howl hula heel heil hila hili
hallo all hollow hulloa aloe ally alloy phalli hall calla ball alow halloa hallow hello hilloa holloa jello wall phyllo maill shallow niello chally willow gally leally mallow tallow wallow pally calo rally sallow dally duello cello follow allow sall holloo hollo hillo halo halloo bellow fillo callow fellow felloe fallow fall billow hulloo hullo call bally walla tally tall dually sally really gall pillow wally mellow mall lilo lall challa shall pall yellow