headrest

noun a cushion attached to the top of the back of an automobile`s seat to prevent whiplash
Found on https://www.encyclo.co.uk/local/20974

headrest

noun a rest for the head
Found on https://www.encyclo.co.uk/local/20974

Headrest

The removable energy-absorbing foam that surrounds the driver's helmet in the cockpit. Three different grades of foam are used, depending on the ambient temperature.
Found on http://www.formula1.com/inside_f1/glossary.html

headrest

[n] - a cushion attached to the top of the back of an automobile`s seat to prevent whiplash 2. [n] - a rest for the head
Found on http://www.webdictionary.co.uk/definition.php?query=headrest
No exact match found