The word "osphresiology" refers to the study of sense of smell, but there are several synonyms that can be used to describe the same thing. The most obvious synonym is "olfactology," which is derived from the Latin term for smell, "olfactus." Another word that can be used is "osmology," which describes the scientific study of odor and aromas. "Aroma science" or "aromatology" can also be used to describe the study of the sense of smell. Additionally, "olfactory perception" is another term that can be used to refer to the way humans interpret and process smells. All of these synonyms help to encapsulate the broad field of osphresiology.