fontanelle or fontanel /fon-tə-nelˈ/

1. A membrane-covered gap between the immature parietal bones in the skull of a fetus or infant
2. An opening for discharge (medicine)

• blobbing
• blobby
• blobs
• bloc
• block
• blockade
• blockaded
• blockade-runner
• blockade-runners
• blockades
• blockading
• blockage
• blockages
• block and tackle
• block and tackles
• blockboard
• blockboards
• block-book
• block-books
• blockbuster
• blockbusters
• blockbusting
• blockbustings
• block capital
• block capitals