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.]
- walking delegate
- walking fern
- walking horse
- walking leaf
- walking papers
- walking stick
- walk in the park
- walk-off
- walk off/away with
- walk off with
- walk of life
- walk of shame
- walk-on
- walk on air
- walk out
- walkout
- walk out on
- walk over
- walkover
- walk (someone) through
- walk someone through
- walk the plank
- walk the walk
- walk through
- walk-through