It seems a bit lazy to just swap an E for an X. Ideally you want a word that doesn't include "m_n" at all. I'd suggest Womble. It's a memorable word and easy to pronounce.
While I can kinda see the idea behind this it is extremely dumb. You are going to go out and make a new word and you can't think of anything better than changing the 'a/e' in woman/women to an 'x'? Should have hired out to a fantasy/sci-fi writer instead, they could have come up with something more interesting than this.
God, don't be silly man...everyone knows that tables are actually gender neutral until you put something on them. Haven't you been taught anything?That's so silly. Everything in nature is gendered. That's how the world works! Tables are obviously female, and books are male, as the good Lord intended!