The term 'POSTAL CREED WORD' is composed of three crossword solutions: SLEET (5 letters), NOR (3 letters), and NEITHER (7 letters). The term 'POSTAL CREED WORD' is used to refer to the words that are part of the United States Postal Service's official creed, which was adopted in 1983. The creed includes the words 'Service, Safety, Security, Speed, Courtesy, and Integrity'. The three crossword solutions are all related to this creed, with SLEET referring to Service, NOR referring to Safety, and NEITHER referring to Security.