Neutral:
* Eloquent: This implies using words well, with elegance and precision.
* Articulate: This means able to express oneself clearly and effectively.
* Well-spoken: This refers to someone who speaks in a clear and pleasant way.
* Learned: This suggests someone with extensive knowledge and vocabulary.
Negative:
* Pretentious: This implies using big words to sound more intelligent or impressive than they actually are.
* Pompous: Similar to pretentious, this suggests someone who is self-important and uses big words to show off.
* Pedantic: This describes someone who is excessively concerned with minor details and uses big words to show off their knowledge.
* Obscure: This means using words that are difficult to understand, making communication unclear.
Other options:
* Logophile: This literally means "lover of words," and might describe someone who enjoys using big words.
* Sesquipedalian: This refers to someone who uses long words.
* Grandiloquent: This means using language that is excessively elaborate or pompous.
The best word to use depends on the specific situation and the intended meaning.