Confirm vs Establish

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

Confirm

Top 2,000 (common) B1 verb

Establish

Top 1,000 (very common) B2 verb

Most common: Establish

	Confirm	Establish
Pronunciation	🇬🇧 //kənˈfɜːm// 🇺🇸 //kənˈfɜrm//	🇬🇧 /["/ɪˈstæblɪʃ/","/ɪˈstæblɪʃɪz/","/ɪˈstæblɪʃt/","/ɪˈstæblɪʃɪŋ/"]/ 🇺🇸 /["/ɪˈstæblɪʃ/","/ɪˈstæblɪʃɪz/","/ɪˈstæblɪʃt/","/ɪˈstæblɪʃɪŋ/"]/
Meaning	To say that something is true or to make sure of it.	To set up or create something.
Example	Can you confirm the time for the meeting tomorrow?	The scientist aims to establish a new theory of evolution.
Register	Neutral	Neutral
How common	Top 2,000 (common)	Top 1,000 (very common)
CEFR level	B1	B2
Part of speech	verb	verb
Collocations	confirm a reservation, confirm an appointment, confirm information, confirm a hypothesis, confirm results	initially, originally, formally, attempt to, seek to, try to, an attempt to establish something, an effort to establish something, newly established, initially, originally, formally, attempt to, seek to, try to, an attempt to establish something, an effort to establish something, newly established, firmly, securely, fully, attempt to, seek to, try to, as, become established, get established, previously established, conclusively, definitely, definitively, attempt to, seek to, try to, an attempt to establish something, an effort to establish something
Antonyms	deny, disprove, reject	disband, dissolve, destroy
Common mistakes	Confused with 'affirm' which is more formal., Using 'confirm' without an object in sentences., Incorrectly assuming 'confirmed' is always followed by a date.	Incorrectly using 'establish' as a synonym for 'create' without context., Confusing 'establish' with 'find' or 'discover'., Using 'establish' in transitive constructions without an object.
Usage notes	Use 'confirm' in both formal and informal contexts, such as meetings or casual conversations. It's appropriate when verifying information or giving approval.	Use 'establish' in formal and academic contexts when setting up institutions, relationships, or laws. It's less common in casual conversation.

See it in real clips

The Pitt › S1 E1

The labs confirm it.

Agents of S.H.I.E.L.D. › S1 E1

They want us to go in and confirm it.

The Pitt › S1 E1

The labs confirm it.

Agents of S.H.I.E.L.D. › S1 E1

They want us to go in and confirm it.

Confirm

Frequently asked questions: Confirm vs Establish

What's the difference between Confirm and Establish?

Confirm: To say that something is true or to make sure of it. Establish: To set up or create something.

Which is more common: Confirm and Establish?

Establish is the most common in everyday English.

Which is more advanced: Confirm and Establish?

Establish is the highest level, at B2, on the CEFR scale.

Are Confirm and Establish the same CEFR level?

Confirm: B1, Establish: B2 on the CEFR scale.

What part of speech are Confirm and Establish?

Confirm: verb, Establish: verb.

Can you show an example of each?

Confirm: Can you confirm the time for the meeting tomorrow? Establish: The scientist aims to establish a new theory of evolution.

Can I use Confirm and Establish interchangeably?

Not always. Confirm and Establish 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.