The noun proximity means the state of being near in space or time.
Synonyms are adjacency, closeness, concurrence, or contiguity.
The word origins from Middle French (late 14th century) proximité meaning “nearness”, and from Latin proximitatem meaning “nearness, vicinity”, from proximus meaning “nearest, next, most direct, adjoining”. The figuratively meaning “latest, most recent, next, following, most faithful”, superlative of prope meaning “near”.
Her far proximity sent him heart breaking.
The friends are no longer in close proximity to each other.
They became aware of the proximity of the Indians.