1. If you are talking about the *act* of loving:
* Love: This is the most common noun form, referring to the feeling or emotion itself.
* Example: "Their love for each other was evident."
2. If you are talking about a *person* who is loving:
* Lover: This refers to a person who loves someone else romantically.
* Example: "She is a lover of all animals."
* Beloved: This can refer to a person who is deeply loved by someone else.
* Example: "He was her beloved husband."
3. If you are talking about a *quality* of being loving:
* Lovingness: This refers to the state of being loving or affectionate.
* Example: "The lovingness in their eyes was unmistakable."
* Affection: This refers to a feeling of fondness or love.
* Example: "He showed great affection towards his family."
The best choice will depend on the specific meaning you want to convey.