Assurance vs Confidence

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

Assurance

FormalTop 3,000 (common)C1noun

Confidence

Top 1,000 (very common)B2noun
Most formal: AssuranceMost common: Confidence
 AssuranceConfidence
Pronunciation🇬🇧 /["/əˈʃʊərəns//əˈʃɔːrəns/"]/🇺🇸 /["/əˈʃʊrəns/"]/🇬🇧 /["/ˈkɒnfɪdəns/"]/🇺🇸 /["/ˈkɑːnfɪdəns/"]/
MeaningA promise that something will happen or be true.Believing in yourself and your abilities.
ExampleThe company offered an assurance that their products were of the highest quality.Her confidence in her abilities helped her succeed in the competition.
RegisterFormalNeutral
How commonTop 3,000 (common)Top 1,000 (very common)
CEFR levelC1B2
Part of speechnounnoun
Collocationsabsolute, categorical, clear, have, give somebody, make, assurance about, assurance by, assurance from, despite assurances, calm, quiet, great, have, showabsolute, complete, full, enjoy, feel, have, decline, decrease, fall, confidence about, confidence among, confidence between, a crisis of confidence, have every confidence, have the utmost confidence, considerable, enormous, great, have, demonstrate, display, drain, drain away, evaporate, boost, booster, builder, with confidence, confidence about, confidence in, a lack of confidence, a loss of confidence, absolute, complete, full, enjoy, have, keep, game, trick, man, in confidence, a breach of confidence, in strict confidence, whispered, exchange, share, keep
Antonymsdoubt, uncertainty, insecurityinsecurity, doubt, fear
Common mistakesConfused with 'insure' or 'ensure', Used in informal situations where simpler words would be better, Mispronunciation, especially stressing the wrong syllableConfusing 'confidence' with 'confident' (adjective) in use., Using 'confidence' in situations requiring a synonym, like 'trust' or 'faith', but meaning differently., Mispronouncing it as 'con-fid-ence' instead of 'con-fi-dence'.
Usage notesOften used in business or legal contexts when making promises or guarantees. Not commonly used in casual conversations.Use 'confidence' in both casual and formal contexts. It's appropriate when discussing self-belief, particularly in academic or professional settings.

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Assurance
Confidence

Frequently asked questions: Assurance vs Confidence

What's the difference between Assurance and Confidence?

Assurance: A promise that something will happen or be true. Confidence: Believing in yourself and your abilities.

Which is more formal: Assurance and Confidence?

Assurance is the most formal of these.

Which is more common: Assurance and Confidence?

Confidence is the most common in everyday English.

Which is more advanced: Assurance and Confidence?

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

Are Assurance and Confidence the same CEFR level?

Assurance: C1, Confidence: B2 on the CEFR scale.

What part of speech are Assurance and Confidence?

Assurance: noun, Confidence: noun.

Can you show an example of each?

Assurance: The company offered an assurance that their products were of the highest quality. Confidence: Her confidence in her abilities helped her succeed in the competition.

Can I use Assurance and Confidence interchangeably?

Not always. Assurance and Confidence 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.