For objects:
* Item: A more formal word for "thing."
* Object: Emphasizes the physical nature of the thing.
* Gadget: For a small, often mechanical device.
* Stuff: A casual word for a group of things.
* Possession: Something owned.
* Article: A specific item or object, often written about.
For abstract ideas or concepts:
* Matter: For something that is important or relevant.
* Issue: For a problem or topic.
* Concept: An idea or thought.
* Idea: A thought or suggestion.
* Subject: The topic being discussed.
For events or experiences:
* Event: Something that happens.
* Occurrence: Something that happens, often unexpected.
* Experience: Something that happens to you.
* Incident: An event, often negative.
For people:
* Person: A human being.
* Individual: A single person.
* Entity: A person or organization.
For general use:
* Something: A more specific way to say "thing."
* Anything: Used when referring to any possible thing.
* Nothing: The absence of anything.
Can you give me more context about what you're writing, and I can help you choose the best replacement for "thing"?