adjacent vs conterminous

adjacent and conterminous both are adjectives.

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

As adjectives, adjacent and conterminous are synonyms defined as:

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

Other synonyms of adjacent include contiguous, neighboring, neighbouring.

adjacent (adjective)	conterminous (adjective)
nearest in space or position; immediately adjoining without intervening space	being of equal extent or scope or duration
having a common boundary or edge; abutting; touching	connecting without a break; within a common boundary
near or close to but not necessarily touching	having a common boundary or edge; abutting; touching