post-haste
As quickly as possible
Post-haste means with great speed or urgency, as fast as possible: The documents were sent post-haste to the capital.
The word comes from instructions written on letters—"haste, post, haste"—urging mail carriers to ride quickly.
It sounds somewhat old-fashioned or literary today, often used for effect: He departed post-haste when he heard the news.
Done with excessive speed
- hurriedDone too quickly
- precipitateHeadlong and reckless
- headlongHastily and recklessly
- pell-mellIn confused, reckless haste
scramble · breathless · impetuous · reckless · slapdash · flustered · panicked · frantic
rushed
Done with excessive speed
- hurriedDone too quickly
- precipitateHeadlong and reckless
- headlongHastily and recklessly
pell-mell · scramble · breathless · impetuous · reckless · slapdash · flustered · panicked · frantic · helter-skelter
swift
Moving with speed
- rapidMoving with haste
- expeditiousDone with prompt efficiency
- quickMoving with speed
fleet · brisk · lightning · express · breakneck · fast · speedy · hurried · prompt · snappy
urgent
Needing immediate attention
- pressingRequiring immediate attention
- criticalExpressing disapproval or importance
- imperativeUnavoidably necessary
dire · exigent · crucial · vital · essential · emergency · compelling · acute · burning · insistent
post-hasteleisurely
Done without urgency
slowly · unhurriedly · gradually · at a snail's pace · sluggishly