1. In a vindictive, revengeful manner
   - vengefully, vindictively

See also: revengeful

• onion louse
• onion mildew
• onion plant
• onion roll
• onion salt
• onion smut
• onion stem
• onion thrips
• onion yellow dwarf
• onion yellow-dwarf virus
• onionskin
• Oniscidae
• Oniscus
• online
• onlooker
• onlooking
• only
• only if
• only too
• only when
• Ono
• Onobrychis
• Onobrychis viciaefolia
• Onobrychis viciifolia
• Onoclea