neighboring vs contiguous

neighboring and contiguous both are adjectives.

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

As adjectives, neighboring and contiguous are synonyms defined as:

neighboring and contiguous: having a common boundary or edge; abutting; touching

Other synonyms of neighboring include adjacent, conterminous, neighbouring.

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