What is an synonym for effective?

Here are some synonyms for "effective," depending on the context:

General:

* Efficient

* Successful

* Productive

* Powerful

* Potent

* Fruitful

* Operative

* Practical

* Workable

* Achievable

* Impactful

* Resultful

* Yielding

* Worthwhile

For a specific situation:

* Impactful: If you're talking about how something has a strong effect.

* Productive: If you're talking about achieving results.

* Efficient: If you're talking about achieving results without wasting resources.

* Relevant: If you're talking about something that is pertinent to a specific issue.

For a person:

* Competent

* Capable

* Proficient

* Skilled

The best synonym depends on the specific context and what you want to emphasize.