adjacent vs contiguous

adjacent and contiguous both are adjectives.

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

As adjectives, adjacent and contiguous are synonyms defined as:

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

Other synonyms of adjacent include conterminous, neighboring, neighbouring.

adjacent (adjective)	contiguous (adjective)
nearest in space or position; immediately adjoining without intervening space	very close or connected in space or time
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