General synonyms:
* Decline: This is a very broad synonym, meaning a decrease or reduction.
* Wane: This implies a gradual decrease, often used to describe things like the moon or a person's influence.
* Recession: This specifically refers to a decline in economic activity.
* Retreat: This implies a movement backwards or away from something.
Synonyms for "ebb" specifically referring to tides:
* Flow out: This refers to the movement of water away from the shore.
* Recede: This is another word for the tide going out.
Synonyms for "ebb" specifically referring to emotions:
* Subside: This implies a gradual decrease in intensity.
* Diminish: This suggests a reduction in strength or importance.
* Fade: This implies a gradual disappearance.
The best synonym for "ebb" will depend on the specific context in which it is being used.