Farewell vs Goodbye vs So long

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

Farewell

Top 5,000 (fairly common)

Goodbye

Top 2,000 (common)A1

So long

InformalTop 2,000 (common)
 FarewellGoodbyeSo long
Pronunciation🇬🇧 //fɛəˈwɛl//🇺🇸 //fɛrˈwɛl//🇬🇧 /["/ˌɡʊdˈbaɪ/"]/🇺🇸 /["/ˌɡʊdˈbaɪ/"]/🇬🇧 //səʊ lɒŋ//🇺🇸 //soʊ lɔŋ//
MeaningA way to say goodbye.A way to say that you are leaving someone.Goodbye.
ExampleShe waved a heartfelt farewell as the train departed.Goodbye! It was great to meet you.I have to go now, so long!
RegisterNeutralNeutralInformal
How commonTop 5,000 (fairly common)Top 2,000 (common)Top 2,000 (common)
CEFR level-A1-
Collocationsbid farewell, say farewell, farewell partysay goodbye, bid goodbye, goodbye kiss, goodbye message, goodbye partysay so long, so long, friend, so long and farewell
Antonymsgreeting, welcomehello, greetinghello, welcome
Common mistakesUsed too casually in everyday settings., Confused with 'farewell' as a noun and verb., Overused when a simple 'goodbye' would suffice.Using 'goodbye' in overly casual contexts with close friends., Mixing up with 'goodbye' and 'bye' in different contexts., Confusing 'goodbye' with 'farewell' which is more formal.Used in formal situations where a simple 'goodbye' is better., Misused by saying 'so long' when parting for a short time.
Usage notesUse 'farewell' in formal situations or when parting for a long time. It's less common in casual conversations.Use 'goodbye' in both casual and formal situations. It’s appropriate when leaving friends or in professional settings. It can feel too formal with very close friends or family where 'bye' or 'see you' might be preferred.Used casually among friends. Not suitable for formal settings or professional goodbyes.

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Farewell
Goodbye
So long

Frequently asked questions: Farewell vs Goodbye vs So long

What's the difference between Farewell, Goodbye, and So long?

Farewell: A way to say goodbye. Goodbye: A way to say that you are leaving someone. So long: Goodbye.

Can you show an example of each?

Farewell: She waved a heartfelt farewell as the train departed. Goodbye: Goodbye! It was great to meet you. So long: I have to go now, so long!

Can I use Farewell, Goodbye, and So long interchangeably?

Not always. Farewell, Goodbye, and So long 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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