Vertebrally is an adverb used to describe something related to or located along the spine or backbone. Some synonyms could include "spinally," "dorsally," or "neurally." Spinally refers to something pertaining to the spine specifically. Dorsally refers to something related to the back or upper surface, which can include the spine. Neurally relates to the nerves or nervous system, which are heavily intertwined with the spine. Other options might include "axially" or "longitudinally," both of which refer to something oriented along a central axis or lengthwise. Ultimately, the best synonym to use would depend on the specific context and intended meaning.