Open English Wordnet
Adjectives
(s)conterminous, contiguousconnecting without a break; within a common boundary“the 48 conterminous states”, “the contiguous 48 states”
(s)adjacent, conterminous, contiguous, neighboringhaving a common boundary or edge; abutting; touching“Rhode Island has two bordering states; Massachusetts and Connecticut”, “the side of Germany conterminous with France”, “Utah and the contiguous state of Idaho”, “neighboring cities”