tran·son·ic 
(trăn-sŏnĭk)
(trăn-sŏnĭk)adj.
Of or relating to aerodynamic flow or flight conditions at speeds near the speed of sound.
[TRAN(S)- + SONIC.]
- occupationally
- occupational medicine
- occupational therapist
- occupational therapy
- occupier
- occupy
- occur
- occurrence
- occurrent
- OCD
- ocean
- oceanarium
- oceanaut
- oceanfront
- oceangoing
- Oceania
- oceanic
- Oceanid
- oceanographer
- oceanographic
- oceanographical
- oceanographically
- oceanography
- oceanologic
- oceanological