Antonyms
* Definition: Words that have opposite meanings.
* Example:
* Hot/Cold
* Up/Down
* Happy/Sad
Synonyms
* Definition: Words that have the same or nearly the same meaning.
* Example:
* Happy/Joyful
* Big/Large
* Brave/Courageous
In Summary:
* Antonyms are like two ends of a spectrum, while synonyms are different ways of expressing the same point on that spectrum.
* When you use an antonym, you create a contrast. When you use a synonym, you provide a different word with the same meaning.