If you play words with all the vowels in them that really doesn't help too much because you still don't know which letters were exact or correct.
I'm still trying to figure out the best type of words to use.
www.wordsharp.org/index.php?go...

Formation of the universe...
www.mccelt.com/quantum-boom...

New distraction...
Pin puzzle uses numbers. If you are a good player: you will keep getting bumped up to an higher level, vice versa.
www.wordsharp.org/pin.php

Spiral arm and galactic bar formation.
(triple focus ellipse is a game changer)
www.mccelt.com/spiral-arm-a...

Gravity and the fabric of space...
www.mccelt.com/gravitationa...

Atomic structure and molecular formations...
www.mccelt.com/quantum-thre...