Some common synonyms of void are blank, empty, vacant, and vacuous. While all these words mean "lacking contents which could or should be present," void suggests absolute emptiness as far as the mind or senses can determine.

// a statement void of meaning

Although the words vacuous and void have much in common, vacuous suggests the emptiness of a vacuum and especially the lack of intelligence or significance.

// a vacuous facial expression

The words blank and void are synonyms, but do differ in nuance. Specifically, blank stresses the absence of any significant, relieving, or intelligible features on a surface.

// a blank wall