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
幹線【かんせん】
main line, trunk line
主幹【しゅかん】
chief editor, managing editor, manager, person in charge
基幹【きかん】
mainstay, nucleus, key