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