The Oxford Thesaurus An A-Z Dictionary of Synonyms - emptiness n.

1) voidness, hollowness, vacantness, vacancy, vacuity, blankness, bareness, barrenness, desolation, desertedness, vacuum, void: He was again alone in the vast emptiness of space. After she left, I felt a terrible emptiness. 2) senselessness, meaninglessness, pointlessness, aimlessness, purposelessness, futility, uselessness, worthlessness, hollowness: The emptiness of the candidate's words was apparent to all. 3) vacuity, vacuousness, vacantness, blankness, expressionlessness, emotionlessness: The emptiness of her facial expression told me that she hadn't understood a word.