supersonic /soo- or sū-pər-sonˈik/

1. Above the audible limit
2. Too high-pitched for human hearing (ultrasonic)
3. Faster than the speed of sound
4. Travelling, or capable of travelling, at such a speed

1. A supersonic wave
2. (in pl) the study of such waves

supersonˈically adverb

• night-watchmen
• nightwear
• nightwears
• night-work
• night-worker
• night-workers
• night-works
• nighty
• nig-nog
• nig-nogs
• nigrescence
• nigrescences
• nigrescent
• nigricant
• nigrified
• nigrifies
• nigrify
• nigrifying
• Nigritian
• nigritude
• nigritudes
• nigromancies
• nigromancy
• nigrosin
• nigrosine