The Collaborative International Dictionary
Familiarity \Fa*mil`iar"i*ty\, n.; pl. Familiarities. [OE. familarite, F. familiarit['e]fr. L. faniliaritas. See Familiar.]
The state of being familiar; intimate and frequent converse, or association; unconstrained intercourse; freedom from ceremony and constraint; intimacy; as, to live in remarkable familiarity.
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Anything said or done by one person to another unceremoniously and without constraint; esp., in the pl., such actions and words as propriety and courtesy do not warrant; liberties.
Syn: Acquaintance; fellowship; affability; intimacy. See Acquaintance.
Wiktionary
n. (plural of familiarity English)
Usage examples of "familiarities".
The familiarities allowed to Simon Lafleur, the bodily acrobatic contacts of the two performers, made the dwarf's blood boil.
Not because I am not very well able to check his familiarities, but because I know just how many malicious tongues would start to wag if I were to be seen tête-à-tête with him!