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.
fiber fibber fibre fabber fubar vibrio
giber liber fiber jiber dibber tuber dabber dubber saber daubery rubber sober ribbier rubier nabber robber gibber nubbier bibbery shabbier weber bibber jobber knobbier lubber libri gabber jabber caber hobber fibre fibber fabber bobber cobbier tubber jibber goober webbier sobber taber rubbery daubier ribier suber nobbier cyber bear robbery bobbery ribber dauber tubbier chubbier dobber libber knubbier mobber lobber jobbery libra babier gabbier beer cuber bier cobber yabber