Is 'Every Body' a Single Word?
'Every body' as two separate words is not an indefinite pronoun. It is a noun phrase that is rarely used and refers to every single physical body of humans (dead or alive) or the body of a plane, body of government, the body of a text, etc.
'Everybody' Is a Pronoun
'Everybody' is an indefinite pronoun that indicates every member of a group of people. It has the same meaning as 'everyone', though 'everybody' is more informal and used in spoken language.