Needler is often used to refer to a person who loves to antagonize others with their cutting remarks or criticism. Alternatively, there are several synonyms that can be used to describe this type of person. Some popular options include the terms teaser, taunter, heckler, goader, baiter, and mocker. Each of these words carries a slightly different connotation but all refer to someone who enjoys making others uncomfortable, often using subtle verbal jabs or sarcastic comments. While some may find the behavior of a needler entertaining or amusing, it can quickly become tiresome or hurtful for those on the receiving end.