Here are some ways to express the noun form of "desperate":
1. Using related nouns:
* Desperation: This is the most common noun form, expressing the state of being desperate.
* Need: This can be used when talking about a strong desire or a pressing requirement.
* Urgency: This emphasizes the immediate need or importance of something.
* Plight: This emphasizes a difficult or unfortunate situation that calls for help.
2. Using phrases:
* A desperate act/measure/attempt: This refers to an action taken out of desperation.
* A desperate need for something: This highlights the intense desire for something.
* The desperation of the situation: This emphasizes the severity of the situation.
3. Using metaphors:
* The abyss of desperation: This uses a metaphor to convey the feeling of hopelessness.
* A desperate cry for help: This emphasizes the urgency and intensity of the plea.
The best noun to use will depend on the specific context and the nuance you want to convey.