Propinquity

pro·pin·qui·ty
/prəˈpiNGkwədē/

1.  FORMAL

the state of being close to someone or something; proximity.

"he kept his distance as though afraid propinquity might lead him into temptation" 

Similar: 

proximity
closeness
nearness
adjacency
contiguity

contiguousness

vicinity

vicinage

 

2.

TECHNICAL

close kinship.