Simple:
* The feeling of familiarity washed over her as she entered the old bookstore.
* His familiarity with the city made navigating the streets easy.
More complex:
* Despite their familiarity, the couple found new ways to surprise each other.
* The novel's use of familiarity in its characters created a sense of comfort for the reader.
* The company's new advertising campaign aimed to cultivate a sense of familiarity with its products.
Figurative language:
* The familiarity of her voice brought a sense of peace.
* The familiarity of the song's melody made it feel like an old friend.
As a noun phrase:
* The familiarity of the place made her feel at ease.
* His familiarity with the subject matter made him an excellent teacher.
In different contexts:
* Familiarity breeds contempt - A common proverb.
* He has a familiarity with the law - Meaning he understands legal matters.
* The film's plot lacked originality, relying too heavily on familiarity. - Commenting on a lack of creativity.
By using "familiarity" in different ways and contexts, you can express a range of meanings related to recognition, comfort, and knowledge.