Not a word vs Ridiculous

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

Not a word

Beyond 10,000 (less common)

Ridiculous

Top 1,000 (very common)B2adjective
Most common: Ridiculous
 Not a wordRidiculous
Pronunciation🇬🇧 //nɒt ə wɜːd//🇺🇸 //nɑt ə wɜrd//🇬🇧 /["/rɪˈdɪkjələs/","/rɪˈdɪk/"]/🇺🇸 /["/rɪˈdɪkjələs/","/rɪˈdɪk/"]/
MeaningA phrase used to say something is not real or correct.Very silly or unreasonable; hard to believe.
ExampleWhen he suggested we could fly to the moon in a car, I said, 'That's not a word!'I look ridiculous in this hat.
RegisterNeutralNeutral
How commonBeyond 10,000 (less common)Top 1,000 (very common)
CEFR level-B2
Part of speechadjective
Collocationssay not a word, that is not a word, is not a word, don't use that as a wordbe, feel, look, really, absolutely, completely, a sense of the ridiculous
Antonyms-reasonable, sensible, logical
Common mistakesUsed too seriously; often is a playful phrase., Confused with 'not a phrase' which is less common., Misunderstood as an actual term instead of an idiomatic expression.'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.
Usage notesUsed in casual conversations to indicate something doesn't make sense or is incorrect. Slightly sarcastic when used in disputes.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.

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Not a word
Ridiculous

Frequently asked questions: Not a word vs Ridiculous

What's the difference between Not a word and Ridiculous?

Not a word: A phrase used to say something is not real or correct. Ridiculous: Very silly or unreasonable; hard to believe.

Which is more common: Not a word and Ridiculous?

Ridiculous is the most common in everyday English.

Can you show an example of each?

Not a word: When he suggested we could fly to the moon in a car, I said, 'That's not a word!' Ridiculous: I look ridiculous in this hat.

Can I use Not a word and Ridiculous interchangeably?

Not always. Not a word and Ridiculous 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.

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