General Antonyms:
* Existing: This is the most direct antonym, meaning something is alive and present.
* Living: Similar to "existing", this indicates something is alive and flourishing.
* Thriving: This suggests something is not only alive but flourishing and successful.
* Enduring: This implies something is continuing to exist despite challenges or time.
Specific Antonyms for Specific Contexts:
* Flourishing (for species): This implies the species is thriving and growing in numbers.
* Active (for volcanoes): This indicates a volcano is currently erupting or showing signs of activity.
* Operational (for machines): This means the machine is working and functioning properly.
Other Alternatives:
* Alive: While not a perfect antonym, it emphasizes the opposite of being extinct.
* Present: This emphasizes the opposite of being absent or gone.
The best antonym for "extinct" depends on what you are talking about.