1. By chance
   - possibly, perhaps, maybe, mayhap [archaic], peradventure [archaic] 
2. [archaic] Through chance, "To sleep, perchance to dream.."
   - by chance [archaic]

Encyclopedia: Perchance

• burn
• burn bag
• burn center
• burn centre
• burn down
• burn mark
• burn off
• burn out
• burn plant
• burnability
• burnable
• burned
• burned-out
• burned-over
• burner
• Burnet
• burnet bloodwort
• Burnett
• Burnham
• burning
• burning at the stake
• burning bush
• burnish
• burnished
• burnisher