Opposites:
* Hot/Cold
* Up/Down
* Big/Small
* Light/Dark
* Good/Bad
* Happy/Sad
* Strong/Weak
* Fast/Slow
* Wet/Dry
* Open/Closed
* Clean/Dirty
* Easy/Difficult
* Yes/No
* Right/Wrong
* Alive/Dead
* True/False
* New/Old
Contrasting Actions:
* Push/Pull
* Enter/Exit
* Start/Stop
* Build/Destroy
* Create/Delete
* Give/Take
* Accept/Reject
* Agree/Disagree
* Love/Hate
* Trust/Distrust
* Help/Hinder
* Protect/Harm
Opposing Concepts:
* Order/Chaos
* Freedom/Captivity
* Peace/War
* Hope/Despair
* Success/Failure
* Courage/Fear
* Honesty/Dishonesty
* Justice/Injustice
* Beauty/Ugliness
* Wisdom/Foolishness
* Equality/Inequality
* Modern/Ancient
* Natural/Artificial
Gradations:
* Hot/Lukewarm/Cold
* Big/Medium/Small
* Dark/Dim/Bright
* Strong/Tough/Weak
* Fast/Moderate/Slow
* Wet/Damp/Dry
* Easy/Difficult/Impossible
Note: Some words can have multiple antonyms depending on the context. For example, the antonym of "heavy" could be "light" (weight), "easy" (burden), or "shallow" (thought).
To find antonyms for specific words, you can use an online thesaurus or dictionary.