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.
alloy ally alley allay allow all aloe alow allee al aal ail ala ale awl alae alee
alloy sally cloy illy welly felly coolly allay duello gulley holly cully belly filly folly valley pillowy jolly kelly bellow alley ally hello lilo hallo gally jello hollo willy yellow chally willow wallow tallow dolly sully sallow pulley pally halloo hulloa shallow tally delly really nelly allow lolly hilloa mellow holloo mulley fully bally sallowy follow volley leally hallow bully felloe billy gully jelly pillow phyllo fillo gilly billowy cullay hollow golly dually billow colly fellow wally hulloo callow galley hilly blowy chilly foully molly holloa mallow hillo lily fallow knolly rally dally tallowy hullo willowy halloa niello ploy cello silly dilly dully telly wholly woolly shelly yellowy