- adjacent, next, side by side - 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"
Antonym: distant (indirect, via close)
- side by side - closely related or associated; "a city in which communism and democracy had to live side by side"
Antonym: unrelated (indirect, via related)