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

Encyclopedia: Transonic

• welfare state
• welfare work
• welfare worker
• welfare-statist
• welfarist
• welkin
• well
• well done
• well I never
• well out
• well over
• well thought out
• well up
• well water
• well-adjusted
• well-advised
• well-appointed
• well-balanced
• well-behaved
• well-bound
• well-branched
• well-bred
• well-chosen
• well-conducted
• well-connected