What is noun for glad?

There isn't a single perfect noun for "glad." However, depending on the context, you could use:

* Joy: This is a strong noun that captures the feeling of happiness.

* Happiness: This is a more general term for a positive emotional state.

* Pleasure: This refers to a feeling of enjoyment or satisfaction.

* Delightedness: This emphasizes a feeling of great happiness and excitement.

* Cheerfulness: This describes a state of being happy and optimistic.

You could also use phrases like "a feeling of gladness" or "a sense of joy" to express the idea.