Considerable vs Substantial

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

Considerable

Top 2,000 (common)B2adjective

Substantial

Top 2,000 (common)C1adjective
 ConsiderableSubstantial
Pronunciation🇬🇧 /["/kənˈsɪdərəbl/"]/🇺🇸 /["/kənˈsɪdərəbl/"]/🇬🇧 /["/səbˈstænʃl/"]/🇺🇸 /["/səbˈstænʃl/"]/
MeaningA lot; significant in amount or degree.Large or important
ExampleThe project wasted a considerable amount of time and money.substantial sums of money
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 2,000 (common)
CEFR levelB2C1
Part of speechadjectiveadjective
Collocationsconsiderable impact, considerable effort, considerable amountsubstantial amount, substantial evidence, substantial change, substantial increase, substantial support
Antonymsinsignificant, minor, inconsequentialinsignificant, minor, trivial
Common mistakesConfused with 'considering' as a verb instead of 'considerable' as an adjective., Using 'considerable' with uncountable nouns only, instead of also with countable., Omitting it when it can emphasize significant amounts.Confused with 'substantive' which has a different meaning., Using in place of 'significant' or 'important' without considering context., Overusing in casual contexts where simpler words like 'big' would fit better.
Usage notesUse 'considerable' when discussing something important or substantial. It's appropriate in both written and spoken language, but avoid using it in very casual contexts.Use 'substantial' when describing something that is significant in size, quantity, or importance. It is appropriate in both spoken and written English but might be too formal for casual conversations.

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Considerable

Frequently asked questions: Considerable vs Substantial

What's the difference between Considerable and Substantial?

Considerable: A lot; significant in amount or degree. Substantial: Large or important

Which is more advanced: Considerable and Substantial?

Substantial is the highest level, at C1, on the CEFR scale.

Are Considerable and Substantial the same CEFR level?

Considerable: B2, Substantial: C1 on the CEFR scale.

What part of speech are Considerable and Substantial?

Considerable: adjective, Substantial: adjective.

Can you show an example of each?

Considerable: The project wasted a considerable amount of time and money. Substantial: substantial sums of money

Can I use Considerable and Substantial interchangeably?

Not always. Considerable and Substantial 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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