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.
acarus acres agars across agarose aggers aggros agoras agrees agrias augurs aggress auguries
acarus gaurs agars kurus beggars guars grues gurus saguaros seggars scars sowcars cigars picaros sugars muggars decares cougars dekares hegaris chukars ecrus shikaris vicars gars cares saggars vigorous carrs cars bigarreaus coarse crus carse scares soucars scaurs cruse squares rigorous daycares picaras decorous makars uakaris jaguars chukkars eggars shikars