Nosing is a word that refers to the action of smelling or detecting something by using one's nose. However, there are several synonyms that can be used in place of this word. For example, sniffing is a synonym for nosing, which is commonly used to describe the action of inhaling air through the nose in order to detect a particular smell or scent. Another synonym for nosing is scenting, which is often used to describe the act of using one's sense of smell to detect the presence of something. Other synonyms for nosing include whiffing, smelling, and snuffling, all of which are used to describe the action of inhaling air through the nose in order to detect a scent.