contiguous vs adjacent

contiguous and adjacent both are adjectives.

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

As adjectives, contiguous and adjacent are synonyms defined as:

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

Other synonyms of contiguous include conterminous, neighboring, neighbouring.

contiguous (adjective)	adjacent (adjective)
very close or connected in space or time	nearest in space or position; immediately adjoining without intervening space
connecting without a break; within a common boundary	having a common boundary or edge; abutting; touching
having a common boundary or edge; abutting; touching	near or close to but not necessarily touching