perpendicularity vs orthogonal opposition

perpendicularity and orthogonal opposition both are nouns.

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

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

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

Other synonyms of perpendicularity include orthogonality.

perpendicularity (noun)	orthogonal opposition (noun)
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
the relation of opposition between things at right angles