Difficulty vs One problem

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

Difficulty

Top 2,000 (common)B1noun

One problem

Top 2,000 (common)
 DifficultyOne problem
Pronunciation🇬🇧 /["/ˈdɪfɪkəlti/"]/🇺🇸 /["/ˈdɪfɪkəlti/"]/🇬🇧 //wʌn ˈprɒbləm//🇺🇸 //wʌn ˈprɑbləm//
MeaningHow hard something is.A single issue or difficulty.
ExampleThe difficulty of the exam surprised many students.We have one problem to solve before we can proceed with the project.
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 2,000 (common)
CEFR levelB1-
Part of speechnoun
Collocationsconsiderable, enormous, extreme, level, encounter, experience, face, arise, lie (in something), despite a/​the difficulty, in difficulty, with difficulty, considerable, enormous, extreme, level, encounter, experience, face, arise, lie (in something), despite a/​the difficulty, in difficulty, with difficulty, considerable, enormous, extreme, level, encounter, experience, face, arise, lie (in something), despite a/​the difficulty, in difficulty, with difficultyidentify one problem, face one problem, solve one problem
Antonymseasy, simple, effortless-
Common mistakesConfused with 'difficult' (adjective) vs. 'difficulty' (noun), Using 'difficulties' when referring to multiple challenges, Overgeneralizing to describe feelings instead of tasksConfused with 'one of the problems' which implies multiple issues., Using 'one problem' when referring to a general situation instead of a specific issue.
Usage notesOften used to describe challenges in tasks, tests, or activities. Suitable in both casual and academic contexts. Avoid using in overly informal situations.Use 'one problem' to emphasize a singular issue. It’s suitable in both spoken and written contexts.

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Difficulty
One problem

Frequently asked questions: Difficulty vs One problem

What's the difference between Difficulty and One problem?

Difficulty: How hard something is. One problem: A single issue or difficulty.

Can you show an example of each?

Difficulty: The difficulty of the exam surprised many students. One problem: We have one problem to solve before we can proceed with the project.

Can I use Difficulty and One problem interchangeably?

Not always. Difficulty and One problem 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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