orthogonal opposition vs perpendicularity

orthogonal opposition and perpendicularity both are nouns.

Word	Noun	Adjective	Verb	Adverb
orthogonal opposition	Yes	No	No	No
perpendicularity	Yes	No	No	No

As nouns, orthogonal opposition and perpendicularity are synonyms defined as:

orthogonal opposition and perpendicularity: the relation of opposition between things at right angles

Other synonyms of orthogonal opposition include orthogonality.

orthogonal opposition (noun)	perpendicularity (noun)
the relation of opposition between things at right angles	the quality of being at right angles to a given line or plane (especially the plane of the horizon)
	the relation of opposition between things at right angles