neighbouring vs contiguous

neighbouring and contiguous both are adjectives.

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

As adjectives, neighbouring and contiguous are synonyms defined as:

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

Other synonyms of neighbouring include adjacent, conterminous, neighboring.

neighbouring (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