* Expression: This is the most common abstract noun for "express" and refers to the act of communicating or conveying something.
* Delivery: This refers to the act of conveying something from one place to another, often in a quick or efficient manner.
* Conveyance: This refers to the act of transmitting or transporting something.
* Communication: This refers to the process of exchanging information or ideas.
The best choice depends on the specific situation and the meaning you want to convey. For example:
* "The artist's painting was a powerful expression of her emotions."
* "The company offers delivery services for all its products."
* "The conveyance of goods across the country was a challenge."
* "Effective communication is essential for teamwork."