[{"Bold_text": "noun", "List Items": ["the sharp-pointed head forms the piercing end of a spear .", "any person, contingent, or force that leads an attack, undertaking, etc.:Cuba was the spearhead of the independence movement within Latin America."]}, {"Bold_text": "verb (used with object)", "List Items": ["to lead or initiate (an undertaking):She is spearheading an ambitious research project whose results may be used by NASA.Synonyms: pioneer , initiate , start , lead"]}]