droben/daroben Very old combination of
oben. It means a concrete
oben means "in some elevated place", for example one of the higher shelves of a cupboard, the management or even heaven. It need not mean the highest place.
über is mostly used as a preposition, not as an adverb and then not as a locality adverb. The adverb
über means "more than" or "the rest".
hinauf/herauf means a process that results in a specified, higher place than before. It thus gives a direction.
ober as a single word only used in Austria and there as a preposition having the same meaning as
oberhalb. As a prefix
ober- is also used in other varieties of German meaning "superiour/elevated".
oberhalb is a preposition meaning "above"="higher or more elevated than something else"
aufwärts means "upwards".
hinüber/herüber means a process that results in a specified place geographically different from the starting place with the connotation of crossing something.