What is another word for know-it-alls?
Pronunciation: [nˈə͡ʊɪtˈɔːlz] (IPA) 
Know-it-alls are often seen as arrogant individuals who think they have all the answers. However, there are a variety of ways to describe these types of people without using the term "know-it-all". Some synonyms include: wiseacre, smarty-pants, braggart, show-off, egotist, conceited, and pompous. Each of these words carries a slightly different connotation, but all suggest an individual who is overly confident in their intelligence and abilities. While it may be frustrating to interact with a know-it-all, it's important to remember that everyone has their strengths and weaknesses. So, instead of using negative labels, it may be more helpful to focus on finding common ground and respectful communication.
