From Longman Dictionary of Contemporary Englishspearheadspear‧head1 /ˈspɪəhed $ ˈspɪr-/ verb [transitive] DO something/TAKE ACTIONLEADERto lead an attack or organized action the troops who spearheaded the rescue mission→ See Verb table
Examples from the Corpus
spearhead• Voice over Kington was recently chosen to spearhead a hi-tech answer to job creation.• Likewise, public relations may use advertising to support or spearhead a publicity programme to reinforce messages.• Sadly for Graham we haven't got too many players of true international quality to spearhead his attack this way.• Evita spearheaded legislation for compulsory public education.• True, but it is the sanctions, which the United States spearheaded, that permit such manipulation.• Who is spearheading the government's breastfeeding policy?• Foreign firms are spearheading the growth.• She credited Mosby with spearheading the suit by convincing the other women to join.spearheadspearhead2 noun [countable usually singular] DO something/TAKE ACTIONLEADERa person or group of people who lead an attack or organized actionspearhead of The group became the spearhead of the labor union movement.Examples from the Corpus
spearhead• The tight ranks wavered and melted before the driving spearhead, even though it was now sadly deformed and its speed slackened.• They are the spearhead of the Imperial army, capable of shattering almost any enemy line under the right circumstances.• Moran was the spearhead of the valley's conservation movement.• The spearhead of their sales drive was cooking and water heating, in which their major competitors were the gas boards. 