* Looseness: This is the most direct and general abstract noun for "loose," referring to the state of being loose.
* Freedom: If "loose" refers to a lack of constraint, "freedom" could be the abstract noun.
* Laxity: This implies a lack of strictness or firmness, and could be used if "loose" refers to a lack of control or discipline.
* Flexibility: If "loose" refers to the ability to bend or change easily, "flexibility" could be the abstract noun.
The best abstract noun to use depends on the specific meaning of "loose" in the context.