What is the opposite abstract noun for bravery?

There isn't a single perfect opposite for "bravery" as an abstract noun. It depends on what aspect of bravery you want to focus on. Here are some possibilities:

General opposites:

* Cowardice: This is the most direct opposite, embodying a lack of courage.

* Fear: This captures the emotional state that bravery overcomes.

* Timidity: This emphasizes a lack of confidence and boldness.

More nuanced opposites:

* Caution: While not necessarily negative, caution can be seen as the opposite of reckless bravery.

* Indecision: The inability to act decisively can be the opposite of taking bold action.

* Apathy: This implies a complete lack of interest or concern, which is the opposite of passionate bravery.

The best opposite for "bravery" depends on the specific context you are considering.