I'm making a word game (scrabulous-type) in flash named 'Spellbound' that checks the dictionary (TWL based) if the word is meaningful or not.

It uses a three-dimensional array object 'dictionary' containing a total of 178,691 elements.
eg.
dictionary[0][0][0] = "AA"
dictionary[25][13][0] = "ZOOGEOGRAPHICAL"

It uses binary (logarithmic) search algorithm for arrays larger than 32 elements in length and linear search algorithm for the rest.

Hats off to wiki! [link]