Related Clues:

• Composition of outer space, in old belief
• Old hospital administration
• Cocaine, for one
• Sleep medication
• Number
• Thin air
• Pain reliever
• Anesthesia of old
• Knock-out gas, once
• Old sleep inducer
• Upper regions
• Morphine, e.g.
• Old-style anesthetic
• Sense-dulling drug
• Flammable liquid