Synonyms for Two-dimensional:

n.

bulbous, chunky, concave, asymmetrical, angular, bent, concentric, closed, aerodynamic, clean. eponymous, hero, narrator, character, bad guy, dramatis personae, baddy, ingenue, antihero, heroine. two-dimensional (noun)
multidimensional, planate, coplanar, planar, flattened, platelike, flat, tabular, placoid.

Other synonyms:

Other relevant words:
character, eponymous, hero, aerodynamic, bent, baddy, antihero, heroine, clean, bulbous, concentric, asymmetrical, narrator, concave, chunky, angular, closed.