Silly Site o' the Day

A number of my coworkers like the smartphone app called Words with Friends, a Scrabble-esque program that often confuses me with what they do and don't accept as words. I think I'm going to start looking up some of the entries that pass muster using Is This A Word (via Wonder Tonic), although if I get a "no" answer I'm unsure of where I'd lodge complaints that they're letting through letter combinations that aren't words...