Antonyms of noun familiarity

1 of 5 senses of familiarity

Sense 2
familiarity -- (usualness by virtue of being familiar or well known)
       Antonym of unfamiliarity (Sense 1)
      => unfamiliarity, strangeness -- (unusualness as a consequence of not being well known)

Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun familiarity

5 senses of familiarity

Sense 1
acquaintance, familiarity, conversance, conversancy -- (personal knowledge or information about someone or something)
       => information -- (knowledge acquired through study or experience or instruction)

Sense 2
familiarity -- (usualness by virtue of being familiar or well known)
       => usualness -- (commonness by virtue of not being unusual)

Sense 3
familiarity, intimacy, closeness -- (close or warm friendship; "the absence of fences created a mysterious intimacy in which no one knew privacy")
       => friendliness -- (a friendly disposition)

Sense 4
casualness, familiarity -- (a casual manner)
       => informality -- (a manner that does not take forms and ceremonies seriously)

Sense 5
familiarity, impropriety, indecorum, liberty -- (an act of undue intimacy)
       => misbehavior, misbehaviour, misdeed -- (improper or wicked or immoral behavior)