Contiguity (noun)

The state of being in physical contact with something.

Origin:

Late middle english: from latin contiguitas, from contiguus (see contiguous).

Examples:

1. There is a contiguity between the two islands.
2. The contiguity of the two countries' borders was disputed.
3. The contiguity of the two rooms made it easy to move from one to the other.
4. The contiguity of the two objects was evident from the way they fit together.
5. The contiguity of the two ideas became clear when they were discussed together.