The term 'pecking order' is used to describe a hierarchical system of social organization. The crossword solutions for this term are 'EAT' (3 letters), 'KISSME' (6 letters), 'HIERARCHY' (9 letters), 'GIVEMEAKISS' (11 letters), and 'KISSMEQUICK' (11 letters). These solutions allude to the idea that in a pecking order, those higher up in the HIERARCHY are given preferential treatment, while those lower down must 'EAT' their way up the ladder, or 'kiss up' to those above them in order to gain favor.