Antonyms of adj subsonic

1 sense of subsonic

Sense 1
subsonic (vs. supersonic) (vs. sonic) -- ((of speed) less than that of sound in a designated medium; "aircraft flying at subsonic speeds")

supersonic (vs. sonic) (vs. subsonic) -- ((of speed) greater than the speed of sound in a given medium (especially air); "a supersonic bomber flies so fast that it must release its bombs while the target is still over the horizon")
sonic (vs. subsonic) (vs. supersonic), transonic -- ((of speed) having or caused by speed approximately equal to that of sound in air at sea level; "a sonic boom")

Similarity of adj subsonic

1 sense of subsonic

Sense 1
subsonic (vs. supersonic) (vs. sonic) -- ((of speed) less than that of sound in a designated medium; "aircraft flying at subsonic speeds")