The term 'LACKING VARIETY' can be described by four crossword solutions: HUMDRUM (7 letters), UNVARIED (8 letters), Inarut (6 letters), and Onenote (7 letters). HUMDRUM is defined as dull, monotonous, and tedious. UNVARIED means having no variety or change. Inarut is an archaic word meaning uniform or monotonous. Lastly, Onenote is a synonym for monotonous. All of these words describe a lack of variety, which can refer to a situation, activity, or object that is uninteresting and unchanging.