Such an interesting word. So many applications.
Common ground — when we are in agreement on an issue
Common sense–the ability to use what you know is right
Common law–personal actions over time leading to common ‘ownership’
Common cold–a health condition
Common chord–musical term
Common property–those items that are shared by 2 or more parties
Common denominator–mathematical term
Common noun–that which is not a proper noun
Common core–academic standards defining what a student should know
In common–a sense of mutual agreement
Blessings to you and yours!