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.
decare dekare decree daycare decor decry degree decury decker diker dagger dacker docker dicker digger dogger ducker daiker duiker dickier doggery doggier duckier daiquiri
scare care decare daycare car square soucar screw score scary ocrea acre fiacre lucre core quaere acari eagre decree chickaree cure scree quare nacre meagre puggaree scarey vicar scaur picara picaro crew carr secure sowcar sucre pugaree scar dekare shikaree