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.
holly holy hollo hooly holey hilly holla holloa holloo hollow hell hole hull hill howl hall haole hallo hoyle hullo hillo hello hoolie hilloa halloa hulloo halloo hulloa hallah hallow hila hale haul hail hili heil heel helo halo heal hula
folly coolly knolly dolly jolly colly woolly holly golly wholly molly lolly boll foley mulley galley jelly knoll quoll lowly leally olla belly kelly hollo really bully nelly willy coaly alloy valley welly shelly chilly wooly toll tally dually dooly coyly hilly noily loll mooley fully lily pulley poll gully dilly ally gally roll sully roily filly cullay sally felly alley holey cooly poly dally gilly silly moly foully pally billy holla coly illy bally hooly doll jowly rally volley cully moll holy allay doyly doily dully telly wally delly oily gulley chally cholla shoaly