Insulse is a word that refers to something lacking in taste, flavor or excitement. There are many synonyms for insulse that can be used to add variety to one's vocabulary. Some possible synonyms include bland, dull, flat, tasteless, unappetizing, unsavory, vapid, and unseasoned. Other options include boring, plain, uninteresting, lifeless, and unpalatable. Each of these words can be used to describe food that is lacking in flavor, as well as experiences, conversations and personalities that leave something to be desired. By using multiple synonyms for insulse, one can better convey their meaning and create a more nuanced message.