Strange vs That's unusual

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

Strange

Top 1,000 (very common)A2adjective

That's unusual

Top 2,000 (common)
Most common: Strange
 StrangeThat's unusual
Pronunciation🇬🇧 /["/streɪndʒ/"]/🇺🇸 /["/streɪndʒ/"]/🇬🇧 //ðæts ʌnˈjuːʒəl//🇺🇸 //ðæts ʌnˈjuːʒəl//
MeaningUnusual or odd; not normal.That's not normal or expected.
ExampleThat was a strange noise coming from the basement.I saw a cat wearing a hat, and that's unusual.
RegisterNeutralNeutral
How commonTop 1,000 (very common)Top 2,000 (common)
CEFR levelA2-
Part of speechadjective
Collocationsappear, be, feel, extremely, fairly, very, to, strange and wonderful, appear, be, feel, extremely, fairly, very, to, strange and wonderfulthat's unusual response, that's unusual behavior, that's unusual circumstance
Antonymsnormal, usual, commonnormal, typical, usual
Common mistakesConfusing 'strange' with 'stranger', which refers to a person unknown to you., Using 'strange' when 'unusual' is more suitable in formal contexts., Overusing 'strange' when describing common things.Using inappropriately in formal writing., Mispronouncing as 'that is unusual'., Confusing with 'that's normal' when reacting.
Usage notesUse 'strange' to describe things that are not typical or expected. It can have a slightly negative connotation, depending on context, like feeling uncomfortable about something unfamiliar.Use in conversations to express surprise or curiosity. Suitable in both casual and formal contexts, but may sound too blunt in very formal settings.

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Strange
That's unusual

Frequently asked questions: Strange vs That's unusual

What's the difference between Strange and That's unusual?

Strange: Unusual or odd; not normal. That's unusual: That's not normal or expected.

Which is more common: Strange and That's unusual?

Strange is the most common in everyday English.

Can you show an example of each?

Strange: That was a strange noise coming from the basement. That's unusual: I saw a cat wearing a hat, and that's unusual.

Can I use Strange and That's unusual interchangeably?

Not always. Strange and That's unusual 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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