General Attempts:
* Effort: This is the most general and common choice.
* Attempt: This emphasizes a specific instance of trying.
* Endeavor: This implies a more sustained and determined effort.
Specific Types of Trying:
* Experimentation: If trying involves testing something out.
* Investigation: If trying involves exploring a topic.
* Challenge: If trying involves facing an obstacle.
Other Options:
* Ambition: If trying is motivated by a desire to achieve something.
* Determination: If trying is characterized by strong resolve.
* Perseverance: If trying involves continued effort despite difficulties.
The best abstract noun for "try" will depend on the specific context and the meaning you wish to convey.