The term 'THAT's So Cool!' can be expressed in four different ways using the crossword solutions Neato (5 letters), Ooh (3 letters), WOW (3 letters), and Ohwow (5 letters). Neato is an informal expression of approval, admiration, or enthusiasm. Ooh is an exclamation of surprise or admiration. WOW is an expression of amazement or admiration. Ohwow is an expression of surprise or admiration. All four of these expressions can be used to express the sentiment of 'THAT's So Cool!'