Sameliness refers to the state of being monotonous or lacking in variety. Synonyms for sameliness include mundanity, uniformity, tedium, monotony, dullness, and monotone. Mundanity is the state of being commonplace or ordinary. Uniformity refers to the quality of being the same in form or structure. Tedium is the state of being tedious or boring. Monotony is the quality of lacking in variety or interest. Dullness refers to the quality of lacking liveliness or interest. Monotone is the quality of being monotonic or unvarying in tone or pitch. All of these words can be used interchangeably to describe the lack of variety or excitement in a situation.