Enter a clue or pattern or both:
The Clue
Not like an SST (8 letter answer)
The Answer
SUBSONIC
Tags
Notes
The answer SUBSONIC is so rare that it appears less than once every 2500 puzzles.
Related Clues
At turbo-prop speed
Definition
SUBSONIC as an adjective:
1. (of speed) less than that of sound in a designated medium; "aircraft flying at subsonic speeds"