spacing vs spatial arrangement

spacing and spatial arrangement both are nouns.

Word	Noun	Adjective	Verb	Adverb
spacing	Yes	No	No	No
spatial arrangement	Yes	No	No	No

As nouns, spacing and spatial arrangement are synonyms defined as:

spacing and spatial arrangement: the property possessed by an array of things that have space between them

spacing (noun)	spatial arrangement (noun)
the property possessed by an array of things that have space between them	the property possessed by an array of things that have space between them
the time between occurrences of a repeating event