No. A whole note rest symbol can be used as a "whole bar rest" with the respective length when it is written in the center of the bar as opposed to its normal placement left in a column with other first notes.
There is a very rare case of a "bordun note" with plenty of syllables without prescribed rhythm used in baroque, typically liturgical music (like Monteverdi's Vespers) used in a similar manner in the center of a bar. However, the symbol being used in that function is not a whole note but a full brevis (length of two whole notes).
In contrast to whole bar rests (which are ubiquitous also in modern music), many will never encounter this special case of a whole bar note.