Dictionary:
* Defines words: Explains the meaning of words, often providing multiple definitions and examples of usage.
* Provides pronunciation: Includes phonetic spellings and pronunciations of words.
* Lists parts of speech: Indicates whether a word is a noun, verb, adjective, etc.
* Provides etymology: Shows the origin and history of a word.
Thesaurus:
* Provides synonyms and antonyms: Offers a list of words that have similar or opposite meanings to a given word.
* Helps to improve vocabulary: Encourages writers to use a wider range of words.
* Provides alternatives to overused words: Helps writers avoid repetition and use more precise language.
In short, a dictionary tells you what a word means, while a thesaurus tells you what other words you can use instead.