I can't believe I only just now learned this word. Endosex is the opposite of intersex. I am an endosex person, as my physical and hormonal presentation fits normative medical and social ideas of what a woman's body is "supposed" to be like. Endosexism then is discrimination against intersex people. It has google of only around 6,500 in English and 350 in Spanish, but I did find this definition of it in Spanish as "incurrir en sesgos, discriminar, marginar o patologizar cuerpos intersexuales". Go Universidad de los Lagos in Chile for posting this!
N.B.: this is the intersex pride flag