The term 'Narrowest of Margins' can be described by three crossword solutions: EYELASH (7 letters), HAIR (4 letters), and Skinofonesteeth (15 letters). EYELASH is the thinnest strand of HAIR on the human body, measuring only a few millimeters in length. HAIR is also a thin strand of material, but it is much thicker than an EYELASH. Skinofonesteeth is a phrase that refers to the thin layer of skin that covers the teeth, which is even thinner than an EYELASH or a strand of HAIR. All three of these terms describe something that is very thin, and thus they all fit the description of the term 'Narrowest of Margins'.