Besides vs Furthermore

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

Besides

Top 2,000 (common)B2preposition

Furthermore

FormalTop 2,000 (common)B2adverb
Most formal: Furthermore
 BesidesFurthermore
Pronunciation🇬🇧 /["/bɪˈsaɪdz/"]/🇺🇸 /["/bɪˈsaɪdz/"]/🇬🇧 /["/ˌfɜːðəˈmɔː(r)/"]/🇺🇸 /["/ˌfɜːrðərˈmɔːr/"]/
MeaningAlso; in addition to.Also; in addition to what was said before.
ExampleWe have lots of things in common besides music.He said he had not discussed the matter with her. Furthermore, he had not even contacted her.
RegisterNeutralFormal
How commonTop 2,000 (common)Top 2,000 (common)
CEFR levelB2B2
Part of speechprepositionadverb
Collocationsbesides the point, besides this, besides beingfurthermore, it is important, furthermore, we should consider, furthermore, studies show
Antonymsexcluding, withouthowever, nevertheless
Common mistakesUsing 'besides' when 'beside' (next to) is meant., Confusing 'besides' with 'beside'., Incorrectly using 'besides' with a negative statement.Using 'furthermore' in informal speech too often., Confusing 'furthermore' with 'besides' which can have a different tone., Placing a comma before 'furthermore' incorrectly in sentence structure.
Usage notesUse 'besides' to introduce additional information. It fits informal and formal contexts but is slightly more common in spoken English. Avoid using it at the beginning of a formal document.Use 'furthermore' to add information in formal writing or speech. It's less common in casual conversation. Avoid starting sentences with it in informal contexts.

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Besides

Frequently asked questions: Besides vs Furthermore

What's the difference between Besides and Furthermore?

Besides: Also; in addition to. Furthermore: Also; in addition to what was said before.

Which is more formal: Besides and Furthermore?

Furthermore is the most formal of these.

Are Besides and Furthermore the same CEFR level?

Besides: B2, Furthermore: B2 on the CEFR scale.

Can I use Besides and Furthermore interchangeably?

Not always. Besides and Furthermore 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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