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.
grind grinned groined grained grand ground grenade crinoid grandee groaned greened grunt grant craned kerned gurnet corned kirned garnet granita cairned granite crowned crinite crooned crunode grantee careened carinate coronoid crannied guaranty carronade guarantee
rind grind rend reined rand friend horned girned rindy corned grand grained ruined kirned mourned print sorned drained trained trined warned shrined yearend groined cairned rynd kerned barned brand brined burned earned errand brained forint frond rained gerund learned pernod reearned darned durned trend turned churned yarned yearned
grin garni grain grainy gran grana grannie granny groin gurney