Then, one day, as Taki was walking through the forest of silver trees that lie to the north of Druhim Vanashta, the city of Demons, he saw a snakess sunning herself in the sunless air upon a bank of crystal poppies. This lady snake was like no other he had ever seen.
1991, Henk Gras, All Semblative a Woman's Part?[1] page 378:
Unlike Hercules, Orlando faces a lioness and a snakess.
2019, Mark O. Decker, "On Thinking of College - K.S.U.", in The Road Ahead, Lulu Publishing Services:
I brought a lot of pre-college baggage
To that acreage of learning.
I was thrown into a pit of seething snakes, and snakesses.