contiguousness vs contiguous

contiguousness is a noun but contiguous is not a noun.

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

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

contiguousness (adjective)	contiguous (adjective)
	very close or connected in space or time
	connecting without a break; within a common boundary
	having a common boundary or edge; abutting; touching