Absurd vs Foolish vs Ridiculous vs This is nonsense

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

Absurd

Top 5,000 (fairly common)C1

Foolish

Top 2,000 (common)

Ridiculous

Top 1,000 (very common)B2adjective

This is nonsense

InformalTop 5,000 (fairly common)
Most common: Ridiculous
 AbsurdFoolishRidiculousThis is nonsense
Pronunciation🇬🇧 //əbˈsɜːd//🇺🇸 //əbˈsɜrd//🇬🇧 //ˈfuːlɪʃ//🇺🇸 //ˈfuːlɪʃ//🇬🇧 /["/rɪˈdɪkjələs/","/rɪˈdɪk/"]/🇺🇸 /["/rɪˈdɪkjələs/","/rɪˈdɪk/"]/🇬🇧 //ðɪs ɪz ˈnɒnsəns//🇺🇸 //ðɪs ɪz ˈnɑːnsɛns//
MeaningSomething that is very unreasonable or silly.Not smart or sensible; lacking good judgement.Very silly or unreasonable; hard to believe.This is silly or lacks meaning.
ExampleThe idea that the earth is flat is absolutely absurd.It was foolish to invest all his savings in that risky project.I look ridiculous in this hat.When he said the earth is flat, I replied, 'This is nonsense.'
RegisterNeutralNeutralNeutralInformal
How commonTop 5,000 (fairly common)Top 2,000 (common)Top 1,000 (very common)Top 5,000 (fairly common)
CEFR levelC1-B2-
Part of speechadjective
Collocationsabsurd idea, absurd situation, absurd behaviorfoolish mistake, foolish behavior, foolish decision, foolish question, foolish ideabe, feel, look, really, absolutely, completely, a sense of the ridiculousutter nonsense, complete nonsense, absolute nonsense
Antonymsreasonable, sensible, logicalwise, sensible, prudent, smartreasonable, sensible, logical-
Common mistakesUsing 'absurd' when 'ridiculous' is more appropriate., Confusing 'absurd' with 'absentee'., Overusing 'absurd' in less serious situations.Confusing 'foolish' with 'silly' - 'foolish' implies a lack of wisdom while 'silly' is lighter., Using 'foolish' as a noun - it's strictly an adjective., Incorrectly spelling 'foolish' as 'foolosh'.'Ridiculous' is often confused with 'ridicule' which means to mock or make fun of., Some learners use 'ridiculous' to describe something that is merely unusual, rather than absurd., Confusing 'ridiculous' with 'absurd' – while they are similar, 'absurd' may imply a deeper philosophical meaning.Using it in formal settings where a more polite expression is needed., Confusing it with 'This makes no sense,' which is more about clarity.
Usage notesUsed to describe something that is irrational or illogical. Often used in both formal and informal contexts, but may be less common in casual conversation.Use 'foolish' in both formal and informal contexts when describing decisions or actions that lack wisdom. Avoid using it in serious or sensitive situations where it might offend the person involved.Use 'ridiculous' to express disbelief or to criticize something as absurd. It can be used in both formal and informal settings, but avoid it in very serious contexts.Used in casual conversation to express disbelief or frustration about something that seems illogical or unreasonable.

See it in real clips

Absurd
Foolish
Ridiculous
This is nonsense

Frequently asked questions: Absurd vs Foolish vs Ridiculous vs This is nonsense

What's the difference between Absurd, Foolish, Ridiculous, and This is nonsense?

Absurd: Something that is very unreasonable or silly. Foolish: Not smart or sensible; lacking good judgement. Ridiculous: Very silly or unreasonable; hard to believe. This is nonsense: This is silly or lacks meaning.

Which is more common: Absurd, Foolish, Ridiculous, and This is nonsense?

Ridiculous is the most common in everyday English.

Which is more advanced: Absurd, Foolish, Ridiculous, and This is nonsense?

Absurd is the highest level, at C1, on the CEFR scale.

Can you show an example of each?

Absurd: The idea that the earth is flat is absolutely absurd. Foolish: It was foolish to invest all his savings in that risky project. Ridiculous: I look ridiculous in this hat. This is nonsense: When he said the earth is flat, I replied, 'This is nonsense.'

Can I use Absurd, Foolish, Ridiculous, and This is nonsense interchangeably?

Not always. Absurd, Foolish, Ridiculous, and This is nonsense 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.