- familiarity, intimacy, closeness - close or warm friendship; "the absence of fences created a mysterious intimacy in which no one knew privacy"
--1 is a kind of friendliness
- affair, affaire, intimacy, liaison, involvement, amour - a usually secretive or illicit sexual relationship
--2 is a kind of sexual relationship
- closeness, intimacy - a feeling of being intimate and belonging together; "their closeness grew as the night wore on"
--3 is a kind of belonging
--3 has particulars: togetherness