Diagnosis vs Examination

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

Diagnosis

Top 3,000 (common)C1noun

Examination

Top 2,000 (common)B2noun
Most common: Examination
 DiagnosisExamination
Pronunciation🇬🇧 /["/ˌdaɪəɡˈnəʊsɪs/","/ˌdaɪəɡˈnəʊsiːz/"]/🇺🇸 /["/ˌdaɪəɡˈnəʊsɪs/","/ˌdaɪəɡˈnəʊsiːz/"]/🇬🇧 /["/ɪɡˌzæmɪˈneɪʃn/"]/🇺🇸 /["/ɪɡˌzæmɪˈneɪʃn/"]/
MeaningThe process of finding out what illness someone has.A test to see what someone knows or can do.
Examplea diagnosis of lung cancerThe examination will take place next week, and it's crucial to prepare well.
RegisterNeutralNeutral
How commonTop 3,000 (common)Top 2,000 (common)
CEFR levelC1B2
Part of speechnounnoun
Collocationsaccurate, correct, right, establish, give, make, after diagnosis, before diagnosis, diagnosis of, a method of diagnosiscertification, entrance, final, prepare for, study for, do, paper, question, results, examination in, examination on, careful, close, complete, carry out, conduct, do, confirm something, demonstrate something, reveal something, couch, table, room, on examination, under examination, examination on, careful, close, complete, carry out, conduct, do, confirm something, demonstrate something, reveal something, couch, table, room, on examination, under examination, examination on
Antonymscure, healthfreedom, leisure
Common mistakesConfused with 'diagnostic', which refers to relating to diagnosis., Using 'diagnosis' as a verb; it's a noun., Not specifying the illness after the term, leading to vagueness.Confused with 'test' — examination is often more formal., Used incorrectly as a verb — 'examine' is the verb form., Confused with 'assessment' — although similar, 'examination' implies a more formal setting.
Usage notesUsed mainly in medical contexts. Suitable when discussing health issues. Avoid using in casual conversations unless discussing health with friends.Used in academic or medical contexts. Not typically used in casual conversation. Avoid using in informal settings.

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Diagnosis

Frequently asked questions: Diagnosis vs Examination

What's the difference between Diagnosis and Examination?

Diagnosis: The process of finding out what illness someone has. Examination: A test to see what someone knows or can do.

Which is more common: Diagnosis and Examination?

Examination is the most common in everyday English.

Which is more advanced: Diagnosis and Examination?

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

Are Diagnosis and Examination the same CEFR level?

Diagnosis: C1, Examination: B2 on the CEFR scale.

What part of speech are Diagnosis and Examination?

Diagnosis: noun, Examination: noun.

Can you show an example of each?

Diagnosis: a diagnosis of lung cancer Examination: The examination will take place next week, and it's crucial to prepare well.

Can I use Diagnosis and Examination interchangeably?

Not always. Diagnosis and Examination 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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