Remarkably vs Substantially

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

Remarkably

Top 2,000 (common)B2adverb

Substantially

FormalTop 2,000 (common)C1adverb
Most formal: Substantially
 RemarkablySubstantially
Pronunciation🇬🇧 /["/rɪˈmɑːkəbli/"]/🇺🇸 /["/rɪˈmɑːrkəbli/"]/🇬🇧 /["/səbˈstænʃəli/"]/🇺🇸 /["/səbˈstænʃəli/"]/
Meaningvery surprisingly or in an unusual wayA lot or greatly; a significant amount.
ExampleThe car is in remarkably good condition for its age.The costs have increased substantially.
RegisterNeutralFormal
How commonTop 2,000 (common)Top 2,000 (common)
CEFR levelB2C1
Part of speechadverbadverb
Collocationsremarkably similar, remarkably skilled, remarkably easy, remarkably clear, remarkably highsubstantially increase, substantially improve, substantially higher, substantially lower
Antonymsunremarkably, ordinarily, commonlyslightly, marginally
Common mistakesUsed too frequently in everyday conversation – better for writing or formal speech., Confused with 'remarkable' – remember, 'remarkably' is an adverb.'Substantial' is confused with 'substantially.', Using 'substantially' in casual contexts incorrectly., Incorrectly using 'substantially' as an adjective.
Usage notesUse 'remarkably' to emphasize how surprising or unusual something is. It is appropriate in both written and spoken contexts, but may sound overly formal in casual conversations.Use 'substantially' in formal writing or discussions. It's appropriate for academic, business, or legal contexts but may sound overly complex in casual conversations.

Frequently asked questions: Remarkably vs Substantially

What's the difference between Remarkably and Substantially?

Remarkably: very surprisingly or in an unusual way Substantially: A lot or greatly; a significant amount.

Which is more formal: Remarkably and Substantially?

Substantially is the most formal of these.

Which is more advanced: Remarkably and Substantially?

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

Are Remarkably and Substantially the same CEFR level?

Remarkably: B2, Substantially: C1 on the CEFR scale.

What part of speech are Remarkably and Substantially?

Remarkably: adverb, Substantially: adverb.

Can you show an example of each?

Remarkably: The car is in remarkably good condition for its age. Substantially: The costs have increased substantially.

Can I use Remarkably and Substantially interchangeably?

Not always. Remarkably and Substantially 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.