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.
goral gooral coral graal grail corral gorily grayly gorilla gruel grill craal growl crawl kraal crawly curial greyly grille growly corolla guerilla carl curl guerrilla
boral moral choral gooral goral loral oral coral horal rail trial derail trail orle neural serial graal craal ceorl narial zoarial urial seral corral brail rural drawl cereal sorel surreal zoril drail dural trawl whorl chorale chiral chorial jural rale rial burial poorly real sural gharial kraal oorali irreal aural areal gyral aerial serail loreal ureal parral feral frail curial morale crawl brawl ferial boreal morel viral grail woorali choreal mural shorl
gor goer gore gory gray kora korai agora agorae okra