I would like to know if there is a good adjective that can be used to describe two things that represent opposites. E.g.
Anorexia and bulimia are two [INSERT WORD HERE] examples of eating disorders.
Or maybe something less controversial:
Two [INSERT WORD HERE] examples of colours are black and white...
Words that could make sense would be "polar" or "antipodal", but I am not sure if they can be used in this context.