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.
larrup liriope
larrup chirrup roup croup group sirup sirupy syrup syrupy drupe chirrupy
lar leary glare claro flare blare alary alar lorry liar lear laari laurae laura lari laree lair clary glary