The term 'Level of Rank' can be summarized by the word 'ECHELON', which is a seven-letter word. ECHELON is a French word meaning 'LADDER' or 'steps'. It is used to refer to a hierarchical structure, such as a military or corporate organization, in which each level is ranked according to its importance or authority. In this context, the term 'Level of Rank' refers to the different levels of authority within an organization.