What is the noun for insipid?

There isn't a single perfect noun for "insipid." The closest fit depends on the context and what you want to emphasize. Here are some options:

General:

* Blandness: This is a general term for lacking flavor or excitement.

* Tastelessness: This emphasizes the lack of taste or flavor, particularly in food.

* Dullness: This emphasizes a lack of interest or excitement.

More specific:

* Mediocrity: This implies a lack of quality or originality.

* Banality: This refers to something commonplace or lacking in originality.

* Tedium: This highlights the boredom or monotony.

Figurative:

* Vapidness: This emphasizes a lack of depth or substance.

* Futility: This suggests a lack of purpose or meaning.

Ultimately, the best noun for "insipid" will depend on the specific context.