1. Vigilant
   - on guard, on one's guard, on your guard

See also: wary

• bed sheet
• bed-and-breakfast
• bed-wetting
• Beda
• bedabble
• bedamn
• bedaub
• bedaubed
• bedaze
• bedazzle
• bedbug
• bedchamber
• bedclothes
• bedcover
• bedded
• bedder
• bedding
• bedding geranium
• bedding material
• bedding plant
• Bede
• bedeck
• bedesman
• bedevil
• bedevilment