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Hello

when must I use everybody instead of everyone?
nobody-noone ,everybody-everyone,somebody-someone

what is the difference?
If you are to marry,you must be careful
If you get married, you must be careful

Thanks
Kind Regards
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Hello, sunsail. Welcome to EF.

You can use -body and -one interchangeably, but -body is less formal.
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Dipsikis it possible to hyphenate it?
I believe some authors long ago used to hyphenate it, but no one has hyphenated it for many, many years, so the hyphenated form is not part of modern English.
CJ
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Comments  
Hi
Thank you.This is my first message Emotion: smile
It is acceptable for other pairs? nobody-noone etc

Kind Regards
sunsailIt is acceptable for other pairs? nobody-noone no one etc
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Huevos
sunsailIt is acceptable for other pairs? nobody-noone no one etc

As for the second example, is it possible to hyphenate it?
 CalifJim's reply was promoted to an answer.