The phrase "Knight service" refers to the military service provided by a knight to their lord or monarch. This service may involve fighting in battles, providing protection, or performing other duties as assigned. Synonyms for "Knight service" include "vassalage," "feudal service," "chivalric service," and "military allegiance." Each of these terms emphasizes different aspects of the knight's service, such as their loyalty to their lord, their military obligations, or the code of chivalry that governed their conduct. Despite the variations in phrasing, all of these synonyms ultimately refer to the same basic concept of a knight's duties to their ruler.