1. Relating to or demonstrating acapnia
   - acapnic, acapnotic

See also: acapnia

• backpacker
• backpacking
• backpacking tent
• backpedal
• backplate
• backrest
• backroom
• backroom boy
• backsaw
• backscatter
• backscratcher
• backseat
• backseat driver
• backsheesh
• backside
• backslap
• backslapper
• backslash
• backslide
• backslider
• backsliding
• backspace
• backspace character
• backspace key
• backspacer