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.
gabbros gabbers cabers kabars cobbers goobers kbars cobras cubers kebars
gabbros bros fibbers fibrous vibrios hobbers gibbers jabbers bibbers bobbers lubbers nabbers robbers sobbers dibbers dobros tubbers lobbers biros jibbers cobbers brose broos brios jobbers gabbers brows brosy libbers lowbrows mobbers ribbers rubbers dabbers dobbers dubbers yabbers