Synonyms:
- amain,
- apace,
- at flank speed,
- breakneck,
- by airmail,
- by cable,
- by express,
- by return mail,
- by telegraph,
- double-quick,
- expeditious,
- expeditiously,
- express,
- fast,
- flat-out,
- fleet,
- full tilt,
- hand over fist,
- hand over hand,
- hastily,
- hasty,
- hell for leather,
- hell-bent,
- hell-bent for election,
- in double time,
- in double-quick time,
- in high,
- in high gear,
- in posthaste,
- in seven-league boots,
- lickety-cut,
- lickety-split,
- on the double,
- post,
- promptly,
- quick,
- quickly,
- rapid,
- rapidly,
- snappily,
- speedily,
- speedy,
- swift,
- swiftly,
- trippingly,
- under forced draft,
- whip and spur,
- with all haste,
- with giant strides,
- with rapid strides,
- with speed