eschatology is a theory relating to end of the world events and of humanity, that is, the last things that must happen before and after the extinction of life on Earth.
The word eschatology, in Portuguese, can still mean the act of analyze droppings (stool), being a synonym for cropology, name given in the medical field to laboratory tests of human waste, specifically feces.
Assuming a figurative sense, this term can still be related to the taste of certain individuals for obscene or sordid content.
The answer to the huge distinction between the meanings of both terms can be found in the etymological roots of the words.
Eschatology, in the sense of "theory about the last things that will happen at the end of humanity", emerged from the Greek éskhatos, which means "extreme" or "last", which is added to the suffix logy (study) forms the literal meaning of "study of the last things".
However, the word eschatology, in the sense of "excrement taste", originated from the Greek term skateboards, which means "excrement".
biblical eschatology
In the religious sphere, eschatology is considered a doctrine that studies all the things that will happen before and after the Last Judgment, that is, the end of the human species on planet Earth.
In this sense, eschatology can assume an apocalyptic and prophetic tone, having as truth the idea of death and resurrection.
Learn more about the meaning of Resurrection.