conterminous vs neighbouring

conterminous and neighbouring both are adjectives.

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

As adjectives, conterminous and neighbouring are synonyms defined as:

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

Other synonyms of conterminous include adjacent, contiguous, neighboring.

conterminous (adjective)	neighbouring (adjective)
being of equal extent or scope or duration	having a common boundary or edge; abutting; touching
connecting without a break; within a common boundary
having a common boundary or edge; abutting; touching