coextensive vs conterminous

coextensive and conterminous both are adjectives.

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

As adjectives, coextensive and conterminous are synonyms defined as:

coextensive and conterminous: being of equal extent or scope or duration

Other synonyms of coextensive include coterminous.

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