anterior vs spatial relation

anterior and spatial relation both are nouns.

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

anterior (noun)	spatial relation (noun)
a tooth situated at the front of the mouth	the spatial property of a place where or way in which something is situated

anterior (adjective)	spatial relation (adjective)
of or near the head end or toward the front plane of a body
earlier in time