'Anyone' and 'Anybody':
'Anyone' and 'Anybody' are indefinite pronouns that refer to an unspecified person or people. They have essentially the same meaning and can be used interchangeably. Both pronouns are singular and can take singular verbs. The choice between 'anyone' and 'anybody' is usually a matter of personal preference or style. 'Anybody' is more commonly used in casual, spoken language, while 'anyone' is often preferred in more formal or written contexts.
For example:
"Does anyone/anybody have a pen I could borrow?"
"Is there anyone/anybody who knows the answer?"

'No one' and 'Nobody': 'No one' and 'Nobody' both refer to the absence or lack of a person or people. They are also interchangeable and have the same meaning. Both pronouns are singular and require singular verbs. The choice between 'no one' and 'nobody' is typically based on personal preference or stylistic considerations.
For example:
"No one/nobody wants to be left out."
"There's no one/nobody here to answer the phone."

'Someone' and 'somebody': 'Someone' and 'Somebody' both refer to an unspecified person. Again, they can be used interchangeably, as they have the same meaning. Both pronouns are singular and take singular verbs. The choice between 'someone' and 'somebody' is generally a matter of personal preference or style.
For example:
"I think someone/somebody is waiting for you outside."
"Could somebody/someone please explain this to me?"

'Everyone' and 'everybody': 'Everyone' and 'everybody' both refer to all the people in a group or every individual. Like the previous examples, they can be used interchangeably as they have the same meaning. Both pronouns are singular and require singular verbs. The choice between 'everyone' and 'everybody' is often determined by personal preference or stylistic factors.
For example:
"Everyone/everybody is invited to the party."
"Everybody/everyone should bring their own drinks."

In summary, the differences between 'anyone' and 'anybody', 'no one' and 'nobody', 'someone' and 'somebody', 'everyone' and 'everybody' are minimal. They are often used interchangeably, and the choice between them is largely influenced by personal preference, formality of the context, or stylistic considerations.