Not very probable vs Rare

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

Not very probable

Top 5,000 (fairly common)

Rare

Top 2,000 (common)B1adjective
Most common: Rare
 Not very probableRare
Pronunciation🇬🇧 //nɒt ˈvɛri ˈprɒbəbl//🇺🇸 //nɑt ˈvɛri ˈprɑbəbəl//🇬🇧 /["/reə(r)/"]/🇺🇸 /["/rer/"]/
Meaningsomething that is unlikely to happennot common or usual
ExampleIt’s not very probable that they will win the game.The museum has a collection of rare artifacts from ancient civilizations.
RegisterNeutralNeutral
How commonTop 5,000 (fairly common)Top 2,000 (common)
CEFR level-B1
Part of speechadjective
Collocationsnot very likely, not very possible, not very realisticbe, seem, become, extremely, fairly, very, be, seem, become, extremely, fairly, very
Antonymscertain, likelycommon, usual, frequent
Common mistakesUsing 'not very possible' instead of 'not very probable', Confusing with 'unlikely' without understanding subtle differences, Using it in overly formal contextsConfusing 'rare' with 'rarely', which has a different meaning., Using 'rare' to describe frequency instead of quality., Misplacing 'rare' in sentences, leading to unclear meaning.
Usage notesUse this phrase in discussions about events that are doubtful. Avoid in formal writing where more precise language may be expected.Used to describe something that is not often found or experienced. Suitable in both spoken and written contexts. Avoid using in very informal situations.

See it in real clips

Not very probable
Rare

Frequently asked questions: Not very probable vs Rare

What's the difference between Not very probable and Rare?

Not very probable: something that is unlikely to happen Rare: not common or usual

Which is more common: Not very probable and Rare?

Rare is the most common in everyday English.

Can you show an example of each?

Not very probable: It’s not very probable that they will win the game. Rare: The museum has a collection of rare artifacts from ancient civilizations.

Can I use Not very probable and Rare interchangeably?

Not always. Not very probable and Rare 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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