I've known this term for more than forty years, and I've never heard a synonym for it.
Third person omniscient is a style of writing fiction in which the story is told by a narrator ("third person") who knows the whereabouts and activities of all the characters ("omniscient").
The novel was written with a third person omniscient narrator.
omniscient
Effects of an omniscient third-person narrative is to get an eyewitness to the eventsof the story
Third person omniscient
To show the thoughts and actions of all the characters APEX
third person omniscient (omniscient means that we have no knowledge of the person)
The easiest way to do it is by seeing what you can see. for example, if you can see what the person is feeling, its third person limited or 1st person. but if you don't really know what anyone is thinking, then its third person omniscient.
A third-person limited narrator has insight into only one character, while a third-person omniscient narrator has insight into all the characters.
The two types of third-person points of view are limited or omniscient. Limited third-person point of view focuses on the thoughts and feelings of one character, while omniscient third-person point of view provides insight into the thoughts and feelings of multiple characters.
Third person
Third person omniscient