Synonyms of split-second

split-second 1 of 2

adjective

ˈsplit-ˈse-kənd 

as in instantaneous

done or occurring without any noticeable lapse in time

a day trader who is used to making split-second decisions

Synonyms & Similar Words

• instantaneous
• immediate
• instant
• rapid
• straightaway
• summary
• swift
• quick
• speedy
• prompt
• hit-and-run
• fast

Antonyms & Near Antonyms

• slow
• prolonged
• sluggish
• protracted
• tardy
• dilatory
• deferred
• delayed

split second

2 of 2

noun

as in minute

a very small space of time

a devastating accident can cause everything in your life to change in a split second

Synonyms & Similar Words

• minute
• second
• moment
• heartbeat
• instant
• nanosecond
• trice
• twinkling
• shake
• twinkle
• wink
• beat
• jiffy
• New York minute
• flash
• microsecond
• eyeblink
• jiff
• snatch
• spurt

Antonyms & Near Antonyms

• age
• eternity
• forever
• lifetime
• infinity
• eon

Example Sentences

Recent Examples of split-second

Adjective

If the business genuinely needs split-second freshness on individual records and heavy analytics, forcing both onto one platform can compromise performance and inflate costs—two specialized systems may be cheaper long term. — Kevin Mathrani, Forbes.com, 29 July 2026

And for the Florida native, her trailblazing achievement was about far more than getting split-second decisions right in the face of online misogyny. — Amanda Davies, CNN Money, 24 July 2026

Noun

Yes, the teenager hasn’t impressed as much as other superstars at this tournament, but that could change in a split second. — Ben Church, CNN Money, 10 July 2026

Every baseball game has multiple turning points — times when a swing being a split second sooner or a fraction of an inch higher could change everything. — C. Trent Rosecrans, New York Times, 5 July 2026