* Modernity: This is a broad antonym, referring to the present or recent times.
* Newness: This emphasizes the opposite of age and suggests something recently created.
* Modern: This specifically refers to things belonging to the present or recent times, often with a focus on style or technology.
* Contemporary: This emphasizes things existing or happening in the same period as something else.
The best choice will depend on the specific meaning you want to convey.