erectness vs spatial relation

erectness and spatial relation both are nouns.

Word	Noun	Adjective	Verb	Adverb
erectness	Yes	No	No	No
spatial relation	Yes	No	No	No

As nouns, spatial relation is a hypernym of erectness; that is, spatial relation is a word with a broader meaning than erectness:

erectness: position at right angles to the horizon
spatial relation: the spatial property of a place where or way in which something is situated

Other hypernyms of erectness include position.

erectness (noun)	spatial relation (noun)
the property of being upright in posture	the spatial property of a place where or way in which something is situated
position at right angles to the horizon