I am looking for a general rule that shows how to compound a quantifier (every, any, each) with a noun (body, thing, box).
I observed that all of the words must be formed with a unspecific quantifier, the noun must be common or universal, and they together must express an undefined idea.
If we focus on the quantifier: the word "everything" (having an imprecise quantifier) can be used in sentences, but "eachthing" not.
Likewise, make the difference between "anyone" and "anyapple", or even "everydog".
In all of these cases, the whole word refers to a undefined thing from a general category.