Effectiveness vs Success

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

 EffectivenessSuccess
MeaningHow well something works or succeeds.When you achieve something you wanted to do.
CEFR levelC1A1
Part of speechnounnoun
Usage notesUsed in both formal and informal contexts, often in discussions of strategies, programs, or methods. Avoid using in overly casual conversations.Use 'success' when talking about achieving goals or winning in a friendly context. Avoid using it in negative situations or as a mockery.

Frequently asked questions: Effectiveness vs Success

What's the difference between "Effectiveness" and "Success"?

"Effectiveness" means: How well something works or succeeds. "Success" means: When you achieve something you wanted to do.

When should I use "Effectiveness" and "Success"?

They can all be used in everyday English.

Are "Effectiveness" and "Success" the same CEFR level?

"Effectiveness" is at C1, "Success" is at A1 on the CEFR scale.

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