ANSWER:
cumulonimbus
A thunderhead can also be called a cumulonimbus cloud. This type of cloud is associated with thunderstorms and can be characterized by its towering structure and anvil shape at the top.
A cumulonimbus cloud/thunderstorm cloud
a rounded projecting mass of a cumulus cloud with shining edges; often appears before a thunderstorm
A hazy Cloud called coma sorrounds the head of a comet.
Kevin Winters has a big head and is also known as "thunder noggin"
Kick it in the head.
Optic nerve head pallor is also called optic atrophy.
His head is always in a cloud. I've been on cloud nine ever since we met.
simile
its a cloud?
Linus
Zeus is the God of Thunder, he's also the head God, I guess you could say according to Greek mythology.