Costly vs That's worth __ grand

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

Costly

Top 2,000 (common)C1adjective

That's worth __ grand

InformalTop 2,000 (common)
Most formal: Costly
 CostlyThat's worth __ grand
Pronunciation🇬🇧 /["/ˈkɒstli/"]/🇺🇸 /["/ˈkɔːstli/"]/🇬🇧 //ðæts wɜːθ grænd//🇺🇸 //ðæts wɜrθ grænd//
MeaningExpensive; needing a lot of money.This means something has a value of a certain amount of money, usually thousands.
ExampleBuying new furniture may prove too costly.This car is worth three grand.
RegisterNeutralInformal
How commonTop 2,000 (common)Top 2,000 (common)
CEFR levelC1-
Part of speechadjective
Collocationsbe, become, prove, extremely, fairly, very, for, in, in terms of, be, become, prove, extremely, fairly, very, for, in, in terms ofworth a lot of grand, worth ten grand, that's worth more than grand
Antonymsinexpensive, cheap-
Common mistakesConfused with 'cost' which refers to the price itself., Used in a context where 'valuable' would be more appropriate., Assuming it only refers to money when it can also refer to high costs in other aspects, like time.Saying 'that's worth two grands' instead of 'that's worth two grand'., Confusing 'grand' with other terms like 'cash' or 'bucks'.
Usage notesUse 'costly' to describe something that requires a lot of money, especially in a neutral or formal context. Avoid using it in very casual settings, where simpler words like 'expensive' might be preferred.Commonly used in casual conversations about money. Avoid in formal writing or business contexts.

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That's worth __ grand

Frequently asked questions: Costly vs That's worth __ grand

What's the difference between Costly and That's worth __ grand?

Costly: Expensive; needing a lot of money. That's worth __ grand: This means something has a value of a certain amount of money, usually thousands.

Which is more formal: Costly and That's worth __ grand?

Costly is the most formal of these.

Can you show an example of each?

Costly: Buying new furniture may prove too costly. That's worth __ grand: This car is worth three grand.

Can I use Costly and That's worth __ grand interchangeably?

Not always. Costly and That's worth __ grand 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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