Waddiwasi	wa di WA zee
Wand	wand
Weasley	WEEZ lee
Wingardium Leviosa	win GAR dee um/ le vee OH sa
Wizengamot	WIZ-en-GAH-mot
Wotcher	WO-cher
Wronski Feint	ron SKEE/ faynt

 

 

 

The English to American Dictionary (I found this to be the funniest guide!)
Dictionary of English Slang and Colloquialisms of the UK
American/British Dictionary
British to Canadian Vocabulary Guide (you need Acrobat Reader for this)
Other Links