Usually Hyperbole GWIT Mystery Cache

Here is a puzzle for you all.  I am making this an easy GWIT.  I wish you the best.

So you are looking for a word.  It is an uncommon word but still it works in Scrabble.  17pts in scrabble to be precise.  Word with friends it goes up to 20pts.  Some people think this word is very large but others can't actually state how big it is.  I don't exactly know why I chose this word out of the million other words I could have used.  I really wanted it to be the title but alas I digress. This truly is a GWIT.  So good luck

Thanks for all who attempt this one.

You can validate your puzzle solution with certitude.