1. A nervous, exciting, or uncomfortable situation
   - nail biter

Derived forms: nail-biters

• aerify
• aero-
• Aerobacter
• Aerobacter aerogenes
• aerobatic
• aerobatics
• aerobe
• aerobic
• aerobic exercise
• aerobics
• aerobiosis
• aerobiotic
• aerodontalgia
• aerodrome
• aerodynamic
• aerodynamic force
• aerodynamic lift
• aerodynamically
• aerodynamics
• aeroembolism
• aerofoil
• aerogel
• aerogenerator
• aerogram
• aerogramme