Compounds of たんこぶ

• たんこぶ
  (n) bump
  lump
  protuberance
  swelling
• 目の上のたんこぶ
  (exp) a thorn in one's side
  a pain in the butt (often someone higher in rank, ability, etc.)
  a person standing in one's way
  a superior who obstructs one's freedom of action