noun
commonality
kah-mun-AL-ih-tee/ˌkɑːmənˈæləti/
A feature, quality, or condition shared by people or things.
Despite their different shapes, the three leaves share the commonality of serrated edges.

Etymology
The community sense of comunalte appears in the word's early meaning, people considered collectively. The modern meaning shifts the focus from the people themselves to a feature or quality that people or things share.
In context
a commonality between both septic and geologic requirements is that they are governed by state codes in addition to local ordinances
More examples
- Despite their differences, the two proposals have several commonalities.
- The researcher looks for commonalities in the patients' symptoms.
- Their shared childhood experiences create a sense of commonality.
Forms
commonality · commonalities
common adjective — Shared by multiple people or things.
Similar words
- similarity
- Suggests resemblance rather than a feature that is actually shared.
- overlap
- Emphasizes areas where interests, activities, or characteristics partly coincide.