perpendicularity vs oblongness

perpendicularity and oblongness both are nouns.

Word	Noun	Adjective	Verb	Adverb
perpendicularity	Yes	No	No	No
oblongness	Yes	No	No	No

As nouns, oblongness is a hypernym of perpendicularity; that is, oblongness is a word with a broader meaning than perpendicularity:

perpendicularity: the quality of being at right angles to a given line or plane (especially the plane of the horizon)
oblongness: the property of being shaped like a rectangle

Other hypernyms of perpendicularity include rectangularity.

perpendicularity (noun)	oblongness (noun)
the quality of being at right angles to a given line or plane (especially the plane of the horizon)	the property of being shaped like a rectangle
the relation of opposition between things at right angles