What is an abstract noun for flatter?

There isn't a single perfect abstract noun for "flatter," as it depends on the context. Here are a few options depending on the meaning you want to convey:

General flattery:

* Adulation: This implies excessive praise and admiration.

* Flattery: This is a more neutral term, referring to praise given to gain favor.

* Ingratiation: This suggests an attempt to gain favor through insincere flattery.

* Compliment: This is a more positive term, referring to a sincere expression of admiration.

Specific aspects of flattery:

* Charm: This refers to the appealing qualities that make someone likable.

* Persuasion: This refers to the act of convincing someone through flattery.

* Deception: This refers to the act of misleading someone through flattery.

The best abstract noun for "flatter" will depend on the specific situation and the nuance you want to express.