Bootlicker is a derogatory term used to describe someone who is overly submissive or obedient towards someone in a position of power in order to gain favor or advantage. Some synonyms for bootlicker include sycophant, toady, flatterer, fawner, yes-man, brown-noser, kiss up, lackey, minion, and ass-kisser. All of these terms describe someone who is subservient to those in authority, often for personal gain. It's important to note that using these terms should be done with caution and consideration for the impact they may have on others. While they may accurately describe someone's behavior, it's important to use language that is respectful and avoids dehumanizing or belittling language.