Moment vs Second

When to use each in English, with meaning, register, and examples.

Moment

Top 1,000 (very common)A1noun

Second

Top 1,000 (very common)
 MomentSecond
Pronunciation🇬🇧 /["/ˈməʊmənt/"]/🇺🇸 /["/ˈməʊmənt/"]/🇬🇧 //ˈsɛk.ənd//🇺🇸 //ˈsɛk.ənd//
MeaningA very short period of time.The number after one; a short time.
ExampleI need a moment to think about my decision.Please wait a second.
RegisterNeutralNeutral
How commonTop 1,000 (very common)Top 1,000 (very common)
CEFR levelA1-
Part of speechnoun
Collocationsbrief, fleeting, passing, last, take, hesitate (for), arrive, come, occur, after a/​the moment, at a/​the moment, for a/​the moment, at a given moment, at any given moment, every waking moment, brief, fleeting, passing, last, take, hesitate (for), arrive, come, occur, after a/​the moment, at a/​the moment, for a/​the moment, at a given moment, at any given moment, every waking moment, brief, fleeting, passing, last, take, hesitate (for), arrive, come, occur, after a/​the moment, at a/​the moment, for a/​the moment, at a given moment, at any given moment, every waking momentwait a second, in a second, second chance
Antonymseternity, foreverfirst, prior
Common mistakesUsing 'moment' to mean a long time instead of a short time., Confusing 'moment' with 'movement'., Mixing up 'moment' with 'measure' in phrases.'Second' is often confused with 'secondly' when listing items., Some learners mistakenly use 'second' instead of 'seconds' when counting time., Mispronounce as 'secone' instead of 'second'.
Usage notesUsed in everyday conversation. It's usually informal, but can be used in formal writing. Avoid using 'moment' to refer to a long duration of time.Use 'second' to indicate time or order. In informal contexts, it can mean agreement (e.g., 'I second that!').

See it in real clips

Moment
Second

Frequently asked questions: Moment vs Second

What's the difference between Moment and Second?

Moment: A very short period of time. Second: The number after one; a short time.

Can you show an example of each?

Moment: I need a moment to think about my decision. Second: Please wait a second.

Can I use Moment and Second interchangeably?

Not always. Moment and Second are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

Related comparisons