The term 'PEAK IN THESSALY' is composed of three crossword solutions: OSSA (4 letters), MTOSSA (6 letters), and PELION (6 letters). OSSA is a mountain in Thessaly, Greece, located in the Larissa regional unit. It is the highest peak in Thessaly, with an elevation of 2, 212 meters. MTOSSA is the second highest peak in Thessaly, with an elevation of 2, 148 meters. PELION is a mountain range in Thessaly, located in the Magnesia regional unit. It has an elevation of 1, 610 meters.