Countless vs Infinite

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

Countless

Top 2,000 (common)C1adjective

Infinite

Top 3,000 (common)
Most common: Countless
 CountlessInfinite
Pronunciation🇬🇧 /["/ˈkaʊntləs/"]/🇺🇸 /["/ˈkaʊntləs/"]/🇬🇧 //ˈɪn.fɪ.nət//🇺🇸 //ˈɪn.fɪ.nət//
Meaningtoo many to countHaving no end or limit.
ExampleI've warned her countless times.The universe is often described as infinite.
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 3,000 (common)
CEFR levelC1-
Part of speechadjective
Collocationscountless opportunities, countless stars, countless hours, countless reasons, countless timesinfinite possibilities, infinite space, infinite loop
Antonymsfew, limited, scarcefinite
Common mistakesConfusing with 'countable' which refers to numbers, Using it in a negative form incorrectly, e.g., 'not countless', Omitting the noun after 'countless'Used incorrectly as a verb form., Confused with 'finite'., Incorrectly modified (e.g., 'most infinite').
Usage notesUsed in both spoken and written contexts. It's more common in formal writing, but can be used in everyday conversation as well. Avoid in very casual settings.Used in various contexts, both in daily conversation and academic discussions. Avoid in casual or overly simplistic contexts.

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Infinite

Frequently asked questions: Countless vs Infinite

What's the difference between Countless and Infinite?

Countless: too many to count Infinite: Having no end or limit.

Which is more common: Countless and Infinite?

Countless is the most common in everyday English.

Can you show an example of each?

Countless: I've warned her countless times. Infinite: The universe is often described as infinite.

Can I use Countless and Infinite interchangeably?

Not always. Countless and Infinite 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.