The word "intratelencephalically" is quite unique, meaning "within the cerebral cortex." However, there are several synonyms that can be used to convey a similar meaning, such as intracortically, endocortically, and intracerebrally. These words are often used in medical and scientific contexts to describe processes or phenomena that occur within the brain's cortex. Other synonyms for "intratelencephalically" may include "cortically," "intraparenchymally," and "locally within the brain." Depending on the context and intended audience, any of these words can be used effectively to convey the same meaning and help readers better understand complex neurological processes.