There are various synonyms that can be used for the word "seignioralty," which refers to the authority or rights granted to a lord or seignior. One common synonym is "feudalism," which describes the social and economic system in which lords provide land and protection to their vassals in exchange for loyalty and service. Another synonym is "lordship," which emphasizes the position of power and authority held by a lord. Other related terms include "fiefdom," "manorialism," and "nobility." These words all relate to the hierarchical structure of medieval society, in which lords exerted significant control over the lives and livelihoods of their subjects.