While "wholly" is sometimes used in the same context as "holy," they are not true homonyms. "Holy" is pronounced differently than "wholly," with a stronger emphasis on the "o" sound.
However, you might find these words close to being homonyms of "wholly":
* "holly" (a type of evergreen plant) - This is pronounced similarly to "wholly" but has a completely different meaning.
* "holy" (sacred, divine) - This is spelled differently but pronounced similarly to "wholly" and can sometimes be used in similar contexts.
Therefore, while no true homonym exists for "wholly," "holly" and "holy" are the closest alternatives in terms of pronunciation and possible usage overlap.