"Unfragrant" is a term used to describe things that are odorless or unpleasant smelling. There are several synonyms for this word that can be used to convey the same meaning. "Foul-smelling," "malodorous," and "pungent" are commonly used synonyms for unfragrant. Other alternatives include "rank," "noisome," and "stinky." Each of these words can be used in place of unfragrant to describe something that has an unpleasant odor. Additionally, using synonyms can help to add variety to your writing and make it more interesting to read.