Familiarness is a word that denotes the state of being familiar with someone or something. There are several synonyms for this word that can be used in place of familiarness to convey a similar meaning. Some of the synonyms for familiarness include intimacy, closeness, familiarity, rapport, and acquaintance. These words denote the level of familiarity one has with a person or thing and suggest that there is a level of comfort and trust present in the relationship. Other synonyms for familiarness include friendliness, camaraderie, and connection, which indicate the bond that exists between people who are familiar with one another. Overall, there are many synonyms for familiarness that can be used to express the closeness and familiarity that we feel with others.