1. Period when something or someone is attacked or criticized without restraint 
2. Period of the year during which game can be hunted without restriction

Derived forms: open seasons

• white beer
• white birch
• white blood cell
• nitrogen cycle
• nitrogen dioxide
• nitrogen fixation
• nitrogen mustard
• nitrogen narcosis
• nitrogen oxide
• nitrogen trichloride
• nitrogen-bearing
• nitrogen-fixing
• nitrogenase
• nitrogenise
• nitrogenize
• nitrogenous
• nitroglycerin
• nitroglycerine
• nitrohydrochloric acid
• nitrosobacteria
• Nitrosomonas
• Nitrospan
• Nitrostat
• nitrous
• nitrous acid