What is another word for successeful?

Here are some words you can use instead of "successful," depending on the context:

General synonyms:

* Triumphant

* Prosperous

* Flourishing

* Accomplished

* Achieved

* Winning

* Effective

* Fruitful

* Productive

* Prolific

* Distinguished

* Renowned

* Notable

More specific synonyms:

* For a business: Profitable, thriving, booming

* For a person: Accomplished, eminent, renowned, celebrated

* For a project: Completed, finished, realized, achieved

Antonyms:

* Unsuccessful

* Failed

* Ineffective

* Unproductive

The best word to use will depend on the specific context of your sentence.