it is Cap
Any type of head covering that satisfies Islam rules. The rule for the head covering (called hijab) is to cover head, hair, and neck but not required to cover face and hands.
hat
are you asking what the cover is called that is on the top of the cylinder head? if so it is called a valve cover.
Helmet
cap
This kind of headwear has many different names. One term for this is a bonnet.
It is mandated in Quran for women to wear clothing covering their whole body (including hair, head, and neck) except face and hands. The clothing that is covering head, hair, and neck is called hijab. It is almost like that worn by Nuns.
Sleeping with a blanket covering your head can increase the risk of suffocation or overheating. It is generally not recommended for safety reasons.
something like anhoki.. (i think) -head covering -veil In Arabic it's called an asharb
The outer covering of the grain is called Husk.
References to head-covering go back as far as the Talmud, about 1700 years ago. Prior to that we can only speculate.
hijab