The term 'PART OF THE NECK?' can be answered by two four-letter words: FRET and NAPE. The word FRET is a verb meaning to worry or be anxious, but in this context it refers to the anatomical feature of the neck known as the nuchal crest or nuchal ridge. This is a bony protuberance located at the back of the neck, just above the spine. The second word, NAPE, is a noun referring to the back of the neck, specifically the area between the base of the skull and the shoulders. Both of these terms are used to describe parts of the neck, and together they provide a comprehensive answer to the question.