Ala (alar) - ala, wing.⏎
Calcaneus - calcar, spur.⏎
Acromion - acron, summit + omos, shoulder.⏎
Arytenoid - arytaina, pitcher; the two cartilages, with the gap between them, look like the spout of a pitcher.⏎
Brachiocephalic - brachion, arm; kephale, head.⏎