A thesaurus is the same as a dictionary?

No, a thesaurus and a dictionary are not the same. Here's the difference:

* Dictionary: Provides definitions and pronunciations of words. It's a guide to the meaning and use of words.

* Thesaurus: Lists synonyms (words with similar meanings) and sometimes antonyms (words with opposite meanings) for a given word. It's a tool for expanding your vocabulary and finding alternative ways to express yourself.

Think of it this way:

* Dictionary: Answers the question "What does this word mean?"

* Thesaurus: Answers the question "What are some other words I can use instead of this one?"