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Diagnosis and Prognosis

Commonly Confused Words


The noun diagnosis refers to the process of analyzing information to understand or explain something. (The plural of diagnosis is diagnoses.)

The noun prognosis means a forecast or prediction. (The plural of prognosis is prognoses.)


  • Medical researchers are examining strategies for the early diagnosis of Alzheimer's disease.

  • The prognosis for continued and sustainable improvements in human well-being on our planet is, at best, guarded.


(a) When the ship's engine wouldn't start, the chief engineer offered a _____ of the problem.

(b) The gloomy _____ for jobs and incomes in the coming year sent stock prices falling.

Answers to Practice Exercises

Glossary of Usage: Index of Commonly Confused Words

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