幹部【かんぶ】
management, (executive) staff, leaders, leadership, top brass, upper echelons
幹事【かんじ】
executive secretary, coordinator, organizer, person in charge of making arrangements
新幹線【しんかんせん】
Shinkansen, bullet train
根幹【こんかん】
foundation, root, basis, core, fundamentals, root and trunk