elbow room vs spatial relation

elbow room and spatial relation both are nouns.

Word	Noun	Adjective	Verb	Adverb
elbow room	Yes	No	No	No
spatial relation	Yes	No	No	No

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

elbow room: space for movement
spatial relation: the spatial property of a place where or way in which something is situated

Other hypernyms of elbow room include position.

elbow room (noun)	spatial relation (noun)
space for movement	the spatial property of a place where or way in which something is situated