Found 12 stronger alternatives to upgrade your writing.
No delay
Nuance: Immediately
Means immediately.
Boring
Please call the nurse quickly if someone faints in class.
Better
Please call the nurse at once if someone faints in class.
Speed (casual)
Nuance: Fast
Common in speech; more casual than quickly.
Boring
I finished the warm-up quickly and had time to check my answers.
Better
I finished the warm-up fast and had time to check my answers.
Rushed
Nuance: Rushed
Suggests you felt rushed.
Boring
I packed my bag quickly when I heard the bus outside.
Better
I packed my bag in a hurry when I heard the bus outside.
No delay
Nuance: Immediately
Means without waiting; more about no delay.
Boring
I answered the email quickly because the deadline was close.
Better
I answered the email right away because the deadline was close.
Speed (idiom)
Nuance: Very fast
Friendly idiom meaning very quickly.
Boring
We finished setting up the booth quickly before the fair opened.
Better
We finished setting up the booth in no time before the fair opened.
No delay (polite/formal)
Nuance: Prompt
Often means on time or without delay.
Boring
She replied quickly to the teacher's message about the schedule change.
Better
She replied promptly to the teacher's message about the schedule change.
Speed (fast)
Nuance: Very fast
A bit more formal; very fast.
Boring
The water level rose quickly during the storm.
Better
The water level rose rapidly during the storm.
Speed (smooth/fast)
Nuance: Fast + smooth
A bit more polished than quickly.
Boring
The goalkeeper moved quickly to block the shot.
Better
The goalkeeper moved swiftly to block the shot.
Speed (formal)
Nuance: Efficient + fast
Formal; often used in reports.
Boring
The office processed the request quickly once the form was complete.
Better
The office processed the request expeditiously once the form was complete.
Speed (formal-ish idiom)
Nuance: Quickly
Means in a short time; a bit formal.
Boring
The crew cleared the stage quickly after the assembly ended.
Better
The crew cleared the stage in short order after the assembly ended.
Speed (formal phrase)
Nuance: High speed
Formal phrase; emphasizes speed.
Boring
The cyclist came down the hill quickly on the final stretch.
Better
The cyclist came down the hill with great speed on the final stretch.
No delay (formal)
Nuance: Immediate
Very clear and formal.
Boring
Please report the issue quickly so we can fix it before class starts.
Better
Please report the issue without delay so we can fix it before class starts.