Do you ever check your manuscript for over-used words? Some editing software will do this for you. Otherwise, think of words you may use too often. One I used more than I realized was massive. We all have our favorite adjectives and adverbs. Make sure you don’t wear it out.
Don’t worry about this during your first draft. That can slow down your creative flow as you get your story on paper. However, when you get to your first edit, watch for them. When one stands out, search on it so you can replace its repeated usage with as many synonyms as possible.