If you use a lot of words when a smaller number of words might be sufficient, someone might describe you as being 'wordy'.
Here are some examples:
- The book is wordy, and repetition of various concepts by different contributors and heaviness on quotations make it slow reading.
- The play suffers from a wordy and lengthy first act which is, to my mind, unavoidably necessary in order to establish the characters.
- Ben, I know that you asked for suggestions as a comment but you must know me by now - wordy, verbose and horribly convoluted.
More examples can be found here:
Hope that helps.