Ninx/Neutrxl (neutral-x or neutral-agender): A gender that is both neutral-gender/ningender and agender/no gender. You can be a neutrally gendered and agender/no gender at the same time, go between them, or fluctuate between feeling neutral and not feeling gender.

Agender Neutral (or neu-agender): Agender individuals find that they have no gender identity, however, an agender neutral has some connection to neutrality/neutralhood or falling between agender and neutrally gendered. 

-Kau