adjacent

(s) nearest in space or position; immediately adjoining without intervening space
- had adjacent rooms
- in the next room
- the person sitting next to me
- our rooms were side by side
side by side, next,
(s) having a common boundary or edge; abutting; touching
- Rhode Island has two bordering states; Massachusetts and Conncecticut
- the side of Germany conterminous with France
- Utah and the contiguous state of Idaho
- neighboring cities
neighboring, conterminous, contiguous,
(s) near or close to but not necessarily touching
- lands adjacent to the mountains
- New York and adjacent cities

side by side next neighboring conterminous contiguous