contiguousness vs contiguity

contiguousness and contiguity both are nouns.

Word	Noun	Adjective	Verb	Adverb
contiguousness	Yes	No	No	No
contiguity	Yes	No	No	No

As nouns, contiguousness and contiguity are synonyms defined as:

contiguousness and contiguity: the attribute of being so near as to be touching

Other synonyms of contiguousness include adjacency.

contiguousness (noun)	contiguity (noun)
the attribute of being so near as to be touching	the attribute of being so near as to be touching