1. (of speed) having or caused by speed approximately equal to that of sound in air at sea level
   - sonic

Encyclopedia: Transonic

• discouraging
• discouragingly
• discourse
• discourteous
• discourteously
• discourtesy
• discover
• discoverable
• discovered
• discovered check
• discoverer
• discovery
• Discovery Day
• discredit
• discreditable
• discreditably
• discredited
• discreet
• discreetly
• discreetness
• discrepancy
• serpent
• serpent fern
• serpent star
• serpent-worship