Head-rest refers to a padded part of a chair or a bed that supports your head and neck while you rest. There are several synonyms for the word head-rest, including head cushion, neck support, pillow, headrest pad, headrest cushion, and cervical pillow. A head cushion is a small cushion designed to support your head while resting, while a neck support is a cushion that keeps your neck aligned with your spine. A pillow is a soft cushion used to support your head while sleeping. Headrest pads and cushions are designed to support your head while sitting. Lastly, a cervical pillow is a therapeutic pillow that helps reduce neck pain by supporting the neck curve.