The term 'agreeable odor' can be broken down into five crossword solutions: SCENT (5 letters), AROMA (5 letters), REEK (4 letters), SMELL (5 letters), and WHIFF (5 letters). SCENT and AROMA are both words used to describe a pleasant SMELL, while REEK, SMELL, and WHIFF are all words used to describe an unpleasant SMELL. STENCH is the strongest word used to describe an unpleasant SMELL. All of these words can be used to describe a variety of odors, both pleasant and unpleasant.