The term 180 degrees from NNW is composed of four crossword solutions: SUR (3 letters), EAST (4 letters), OBTUSE (6 letters), and SEMICIRCLE (10 letters). SUR stands for South, which is the direction 180 degrees from North-Northwest. EAST is the direction that is 90 degrees clockwise from North, which is also 180 degrees from NNW. OBTUSE is an adjective meaning 'blunt or dull, ' which is used to describe an angle greater than 90 degrees but less than 180 degrees. Finally, SEMICIRCLE is a shape that is half of a circle, and 180 degrees is exactly half of a full circle.