Acceptable vs Adequate

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

Acceptable

Top 2,000 (common) B2 adjective

Adequate

Top 2,000 (common) B2 adjective

	Acceptable	Adequate
Pronunciation	🇬🇧 /["/əkˈseptəbl/"]/ 🇺🇸 /["/əkˈseptəbl/"]/	🇬🇧 //ˈædɪkwət// 🇺🇸 //ˈædɪkwɪt//
Meaning	Okay or good enough to be used.	Good enough for what is needed.
Example	The noise level in the library is not acceptable for studying.	The food was adequate, but I expected something better.
Register	Neutral	Neutral
How common	Top 2,000 (common)	Top 2,000 (common)
CEFR level	B2	B2
Part of speech	adjective	adjective
Collocations	be, prove, seem, highly, very, completely, to, the boundaries of acceptable…, the bounds of acceptable…, the limits of acceptable…, be, prove, seem, highly, very, completely, to, the boundaries of acceptable…, the bounds of acceptable…, the limits of acceptable…	adequate resources, adequate solution, adequate response
Antonyms	unacceptable, unsatisfactory, poor	inadequate, insufficient
Common mistakes	Confused with 'acceptable' vs 'accepted'., Using 'acceptable' as a noun incorrectly., Overusing 'acceptable' in contexts that require stronger words like 'excellent' or 'outstanding'.	Confused with 'sufficient' - 'adequate' implies minimum quality, while 'sufficient' means enough in quantity., Using 'adequate' too casually, as it is more formal., Mispronouncing it, especially in unstressed syllables.
Usage notes	Used in both spoken and written contexts to indicate something that meets necessary standards. It can be formal in academic contexts and more casual in everyday conversations. Avoid in circumstances that require high standards or exceptional quality.	Use 'adequate' when something meets the necessary requirements, but is not exceptional. It's often used in formal contexts, like reports or evaluations.

See it in real clips

Ted Lasso › S1 E1

Now, Coach Lasso may not have the CV that you all find acceptable,

Breaking Bad › S1 E1

but thank you, Jesse. I'm glad it's acceptable.

Ted Lasso › S1 E1

Now, Coach Lasso may not have the CV that you all find acceptable,

Breaking Bad › S1 E1

but thank you, Jesse. I'm glad it's acceptable.

Acceptable

Frequently asked questions: Acceptable vs Adequate

What's the difference between Acceptable and Adequate?

Acceptable: Okay or good enough to be used. Adequate: Good enough for what is needed.

Are Acceptable and Adequate the same CEFR level?

Acceptable: B2, Adequate: B2 on the CEFR scale.

What part of speech are Acceptable and Adequate?

Acceptable: adjective, Adequate: adjective.

Can you show an example of each?

Acceptable: The noise level in the library is not acceptable for studying. Adequate: The food was adequate, but I expected something better.

Can I use Acceptable and Adequate interchangeably?

Not always. Acceptable and Adequate 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.