Drastic vs Extreme vs Radical vs Serious vs Severe vs Significant

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

Drastic

Top 2,000 (common)B1

Extreme

Top 2,000 (common)A2adjective

Radical

Top 1,000 (very common)C1adjective

Serious

Top 1,000 (very common)A2adjective

Severe

Top 1,000 (very common)B2adjective

Significant

Top 1,000 (very common)B2adjective
 DrasticExtremeRadicalSeriousSevereSignificant
Pronunciation🇬🇧 //ˈdræstɪk//🇺🇸 //ˈdræstɪk//🇬🇧 /["/ɪkˈstriːm/"]/🇺🇸 /["/ɪkˈstriːm/"]/🇬🇧 //ˈrædɪkəl//🇺🇸 //ˈrædɪkəl//🇬🇧 /["/ˈsɪəriəs/"]/🇺🇸 /["/ˈsɪriəs/"]/🇬🇧 /["/sɪˈvɪə(r)/"]/🇺🇸 /["/sɪˈvɪr/"]/🇬🇧 /["/sɪɡˈnɪfɪkənt/"]/🇺🇸 /["/sɪɡˈnɪfɪkənt/"]/
MeaningVery serious or extremeSomething very strong or intense.Very different from what is normal or traditional.Not joking; importantVery bad or serious.Important or meaning a lot.
ExampleThe company made drastic cuts to reduce expenses.The weather was extreme during the summer, reaching temperatures over 100 degrees Fahrenheit.Her radical ideas on education challenged conventional teaching methods.He has a serious expression on his face.The storm caused severe damage to the coastal towns.The research showed a significant improvement in patient outcomes.
RegisterNeutralNeutralNeutralNeutralNeutralNeutral
How commonTop 2,000 (common)Top 2,000 (common)Top 1,000 (very common)Top 1,000 (very common)Top 1,000 (very common)Top 1,000 (very common)
CEFR levelB1A2C1A2B2B2
Part of speechadjectiveadjectiveadjectiveadjectiveadjective
Collocationsdrastic measures, drastic changes, drastic differences, drastic action, drastic reductionbe, appear, seem, particularly, really, very, at its most extreme, be, appear, seem, particularly, really, very, at its most extremeradical change, radical idea, radical shift, radical reform, radical movementbe, look, seem, extremely, fairly, very, for, nothing serious, serious enough to warrant something, be, look, sound, extremely, fairly, very, aboutbe, seem, sound, extremely, fairly, verybe, prove, become, extremely, fairly, very, for, to
Antonymsmild, gentle, subtlemild, moderate, ordinarymoderate, conservative, traditionalfunny, light-hearted, playfulmild, gentle, lightinsignificant, trivial, minor
Common mistakesConfusing with 'drastic' versus 'drastic changes' - the word is stronger when used with context., Using 'drastic' in a positive sense, when it usually describes negative changes., Misplacing 'drastic' in sentences, often forgetting it needs a context.Confused with 'extremely' which is an adverb., Using 'extreme' when referring to a moderate situation., Incorrectly applying it to describe everyday situations.Confused with 'radicalize' - 'radical' describes an idea, not an action., Used too casually - avoid applying 'radical' to minor changes.Confused with 'seriously' as an adverb instead of an adjective., Using 'serious' in a casual context where 'funny' is more appropriate., Mispronouncing it, leading to misunderstanding.Confusing with 'server', which has a different meaning., Using 'severe' in too casual a context, where 'bad' would be better., Mistaking it for 'serene', which means peaceful.Confusing 'significant' with 'significance'., Using 'significant' as a noun instead of an adjective., Overusing 'significant' in casual speaking.
Usage notesUsed to describe changes or actions that are very strong or severe. It's appropriate in both formal and informal contexts.Used to describe something that is much more than normal or average. It's often used in contexts like sports, weather, or emotions. Avoid in overly casual contexts.Use 'radical' in discussions of ideas or changes that are extreme or revolutionary. Be cautious of its positive or negative connotation depending on context.Use 'serious' to describe someone who is focused or an important situation. Avoid using it in lighthearted contexts.Use 'severe' in contexts like weather, illness, or punishment. It's appropriate in serious discussions but not in casual conversations.Used in academic and formal contexts to indicate importance. Avoid in very casual conversations; instead, use simpler words like 'big' or 'important'.

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Radical
Serious

Frequently asked questions: Drastic vs Extreme vs Radical vs Serious vs Severe vs Significant

What's the difference between Drastic, Extreme, Radical, Serious, Severe, and Significant?

Drastic: Very serious or extreme Extreme: Something very strong or intense. Radical: Very different from what is normal or traditional. Serious: Not joking; important Severe: Very bad or serious. Significant: Important or meaning a lot.

Which is more advanced: Drastic, Extreme, Radical, Serious, Severe, and Significant?

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

Are Drastic, Extreme, Radical, Serious, Severe, and Significant the same CEFR level?

Drastic: B1, Extreme: A2, Radical: C1, Serious: A2, Severe: B2, Significant: B2 on the CEFR scale.

Can you show an example of each?

Drastic: The company made drastic cuts to reduce expenses. Extreme: The weather was extreme during the summer, reaching temperatures over 100 degrees Fahrenheit. Radical: Her radical ideas on education challenged conventional teaching methods. Serious: He has a serious expression on his face. Severe: The storm caused severe damage to the coastal towns. Significant: The research showed a significant improvement in patient outcomes.

Can I use Drastic, Extreme, Radical, Serious, Severe, and Significant interchangeably?

Not always. Drastic, Extreme, Radical, Serious, Severe, and Significant 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.