Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
is rare
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "is rare" is correct and usable in written English.
It can be used to describe something that is uncommon or not frequently encountered. Example: "Finding a four-leaf clover is rare, making it a special find for those who come across one."
✓ Grammatically correct
News & Media
Encyclopedias
Academia
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
60 human-written examples
And it is rare.
News & Media
Crime is rare.
News & Media
Radicalism is rare!
News & Media
Anorexia nervosa is rare.
Encyclopedias
Blight is rare.
News & Media
Reconciliation is rare.
News & Media
The charge is rare.
News & Media
His attitude is rare.
News & Media
Which is rare indeed.
News & Media
But it is rare.
News & Media
Exact reciprocity is rare.
News & Media
Expert writing Tips
Best practice
Use "is rare" when emphasizing the uncommon nature or infrequency of something, especially when contrasting it with more prevalent occurrences.
Common error
Avoid using "is rare" excessively in highly formal or scientific writing where more precise or technical language might be more appropriate. Consider alternatives like "infrequent" or "uncommon" to maintain a consistent tone.
Source & Trust
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "is rare" functions as a linking verb phrase, connecting a subject to a predicate adjective that describes a quality or state of being. As Ludwig AI confirms, it's a common and acceptable construction in English.
Frequent in
News & Media
43%
Academia
20%
Encyclopedias
5%
Less common in
Wiki
5%
Huffington Post
8%
The Guardian
7%
Ludwig's WRAP-UP
In summary, the phrase "is rare" is a grammatically sound and frequently used expression to convey that something is uncommon or infrequent. As Ludwig AI validates, its usage spans diverse contexts from News & Media to Academic writing. While broadly applicable, it's advisable to consider the formality of the context and choose more precise alternatives if needed, particularly in scientific or technical writing. Related phrases like "is uncommon" or "is infrequent" can offer nuanced ways to express the same concept.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
is uncommon
Replaces "rare" with a direct synonym, maintaining the same grammatical structure.
is infrequent
Uses another synonym for "rare", slightly changing the emphasis.
is scarce
Emphasizes a limited supply or availability.
is not common
Uses a negative construction to express the same idea.
is seldom seen
Focuses on the infrequency of observation.
is a rarity
Transforms the adjective into a noun phrase.
is few and far between
Idiomatic expression indicating scarcity and separation.
does not happen often
Shifts the focus to the frequency of occurrence.
is thin on the ground
Idiomatic expression suggesting a lack of availability or presence.
is like hen's teeth
An idiom emphasizing extreme rarity or non-existence.
FAQs
How can I use "is rare" in a sentence?
You can use "is rare" to describe something that doesn't happen or exist often. For example, "Genuine altruism "is rare" in politics".
What are some alternatives to "is rare"?
Depending on the context, you can use alternatives like "is uncommon", "is infrequent", or "is scarce".
Is it grammatically correct to say "is rare"?
Yes, "is rare" is grammatically correct. It follows the standard subject-verb structure where "is" is the verb and "rare" is the predicate adjective describing the subject.
What's the difference between "is rare" and "is unusual"?
"Is rare" emphasizes the infrequency of something, while "is unusual" highlights that something deviates from the norm or is out of the ordinary. The choice depends on whether you want to stress the frequency or the atypical nature of the subject.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested