commonality

1. The joint possession of a set of attributes or characteristics. (countable, uncountable)
2. Such a shared attribute or characteristic (countable, uncountable)
3. A quality that applies to materiel or systems: (a) possessing like and interchangeable parts or characteristics enabling each to be utilized, or operated and maintained in common; (b) having interchangeable repair parts and/or components; (c) applying to consumable items interchangeably equivalent without adjustment. (countable, uncountable)

Plural commonalities