spearhead

noun

Pronunciation: /ˈspɪə.hɛd/ / /ˈspɪɹ.hɛd/ / /ˈspiɹ.hɛd/

Etymology: From Middle English spere-hed; equivalent to spear + head.

The pointed head, or end, of a spear.
“Orion hit a rabbit once; but though sore wounded it got to the bury, and, struggling in, the arrow caught the side of the hole and was drawn out.[…]. Ikey the blacksmith had forged us a spearhead after a sketch from a picture of a Greek warrior; and a rake-handle served as a shaft.”
One who leads or initiates an activity (such as an attack or a campaign).
“Spearheads of the NER bargain fares attack this year have been the introduction of weekend fares at a 7s 6d in the £ discount on ordinary rates between principal stations throughout the Region—[...].”
The leading military unit in an attack.
A player who initiates attacking moves.
“England played at a tempo in attack that was too much for Bulgaria, with width provided at various times by Walcott, Young and Stewart Downing and Rooney acting as the potent spearhead.”

Etymology: From Middle English spere-hed; equivalent to spear + head.

To drive or campaign ardently for (an effort, project, etc.); to direct.
“He spearheaded the entire project from day one.”
“Newcastle have put themselves within touching distance after a fantastic run which has been spearheaded by the goals of Senegal striker Cisse.”