intergender

As adjectives the difference between intergender and transgender

is that intergender is taking place between people of the opposite sex while transgender is (narrowly|of a person) having a gender identity (self-image) which is the opposite of one's physical sex: being physically male but identifying as female, or vice versa.

As a noun transgender is

.

As a verb transgender is

(lb) to change the gender of; (used loosely) to change the sex of.

As adjectives the difference between bigender and intergender

is that bigender is having two genders simultaneously, eg both male and female while intergender is taking place between people of the opposite sex.

As adjectives the difference between neutrois and intergender

is that neutrois is (rare|of a person) having a null or neutral gender (being neither male nor female), and having or seeking to have no or reduced signs of physical sex while intergender is taking place between people of the opposite sex.