Ridiculous vs This is nonsense

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

Ridiculous

Top 1,000 (very common)B2adjective

This is nonsense

InformalTop 5,000 (fairly common)
Most formal: RidiculousMost common: Ridiculous
 RidiculousThis is nonsense
Pronunciation🇬🇧 /["/rɪˈdɪkjələs/","/rɪˈdɪk/"]/🇺🇸 /["/rɪˈdɪkjələs/","/rɪˈdɪk/"]/🇬🇧 //ðɪs ɪz ˈnɒnsəns//🇺🇸 //ðɪs ɪz ˈnɑːnsɛns//
MeaningVery silly or unreasonable; hard to believe.This is silly or lacks meaning.
ExampleI look ridiculous in this hat.When he said the earth is flat, I replied, 'This is nonsense.'
RegisterNeutralInformal
How commonTop 1,000 (very common)Top 5,000 (fairly common)
CEFR levelB2-
Part of speechadjective
Collocationsbe, feel, look, really, absolutely, completely, a sense of the ridiculousutter nonsense, complete nonsense, absolute nonsense
Antonymsreasonable, sensible, logical-
Common mistakes'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 notesUse '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

Ridiculous
This is nonsense

Frequently asked questions: Ridiculous vs This is nonsense

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

Ridiculous: Very silly or unreasonable; hard to believe. This is nonsense: This is silly or lacks meaning.

Which is more formal: Ridiculous and This is nonsense?

Ridiculous is the most formal of these.

Which is more common: Ridiculous and This is nonsense?

Ridiculous is the most common in everyday English.

Can you show an example of each?

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 Ridiculous and This is nonsense interchangeably?

Not always. 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.