Ethmoidal refers to the ethmoid bone, which is a small, delicate bone located at the base of the skull. Synonyms for the word ethmoidal might include ethmoid, ethmopalatine, or ethmomaxillary. Other possible synonyms include nasal, cranial, or orbital, as the ethmoid bone plays a key role in the structure of these areas of the body. Some other related terms might include sphenoidal, maxillary, or mandibular, which are other bones located in the skull and facial region. Overall, there are many different synonyms and related terms that can be used to describe the ethmoid bone and its associated structures.