Mastership refers to the state of being a master, or a person who has control or authority over something or someone. Synonyms for the word mastership include mastery, domination, command, hegemony, leadership, sovereignty, supremacy, and control. Mastery and domination suggest a high level of skill or power over a subject or situation. Command and leadership imply authority or power over a group of individuals or entities. Hegemony and sovereignty express strong control or dominance, often in a political context. Supremacy indicates ultimate or unchallenged power, while control suggests a level of influence over something that can be managed or directed.