Synonyms:
breakneck
Meaning: moving at very high speed; "a breakneck pace"
Usage examples
Such a great sheet of blackness it looks as the train thunders along the side, swinging the curve of the embankment at a breakneck speed as it rounds the corner of the lake.
As you know, Fort Lyon is fifty miles from Kit Carson, and we came all that distance in a funny looking stage coach called a "jerkey," and a good name for it, too, for at times it seesawed back and forth and then sideways, in an awful breakneck way.