protuberance

 
Pronunciation: /prəˈtjuːb(ə)r(ə)ns/

noun

  • a thing that protrudes from something else: some dinosaurs evolved protuberances on top of their heads
  • [mass noun] the fact or state of protruding: the large size and protuberance of the incisors

Spelling help

Remember that protuberance is spelled with -tube- in the middle.