1. Characterized by unrest or disorder or insubordination
   "the tumultuous years of his administration"
   - disruptive, riotous, troubled, turbulent

See also: tumult, unquiet

• overweary
• overweening
• overweight
• overwhelm
• overwhelming
• overwhelmingly
• overwind
• overwinter
• overwork
• overworking
• overwrite
• overwrought
• overzealous
• Ovibos
• Ovibos moschatus
• Ovid
• oviduct
• Oviedo
• oviform
• Ovimbundu
• ovine
• oviparity
• oviparous
• oviposit
• oviposition