Nares deep is a medical term that refers to the depth of the nostrils. However, there are several synonyms that can be used to refer to this term. For instance, the phrase "nasal cavity" can be used to refer to the space inside the nose. "Nasal passage" is another phrase that is used to describe the nostrils, as it implies the path air takes through the nose. "Nasal fossa" is a term that describes the depression in the skull that houses the nostrils. Additionally, "nasal turbinates" is another term that can be used to describe the curved bones inside the nose that help filter, warm, and humidify the air we breathe.