
1) Animated series villain 2) Comic book villain 3) Comic by Geoff Johns 4) DC Comics alien 5) DC Comics telepath 6) Exclusively Saxon word 7) Exclusively Anglo word 8) Fictional cyborg 9) Fictional inventor 10) Fictional professor 11) Fictional robot 12) Fictional shapeshifter 13) Genius 14) Nerd 15) Really smart one
Found on
https://www.crosswordclues.com/clue/brainiac

1) Egghead 2) Einstein 3) Genius 4) Mensan 5) Rocket scientist 6) Whiz 7) Wiz
Found on
https://www.crosswordclues.com/clue/brainiac
No exact match found.