The state of being single, or not married.
Singlenesses can be a time of freedom and independence for some people, but it can also be lonely for others.
Examples:
Her singlenesses allows her to do whatever she wants.
He enjoys the singlenesses of his life.
In her singlenesses, she travels the world.
The cat's singlenesses means it can do whatever it wants.
The singlenesses of the bird means it can fly wherever it wants.
The singlenesses of the tree allows it to grow tall and strong.