Scroll down to Collins Zyzzyva. Choose CSW2015.
Online Scrabble: For those who wish to play online games of scrabble, check out the Internet Scrabble Club WordBiz . For NZ players choose the English dictionary CSW2015 aka SOWPODS.
This is a list of the currently allowable 2,3 and 4 letter words. Keep in mind that what is a commonly used word in one country, is a weird and exotic item for those from a different background. English is a truly diverse language.