The state or characteristic of being contemporaneous.(noun)
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Use "contemporaneousness" in a sentence
"Mr. Rubbino's style is pleasantly mod—a combination of blocky colors and fine lines—but a closer look reveals its contemporaneousness."
"The anomaly had to do with the degree of contemporaneousness of cyclical movements in household and business investment, with the former leading the latter."
"The thesis that experience of the contemporaneousness of art involves us in more than what we are presently aware of (i.e., the “substance” of underlying and on-going trans-individual linguistic and cultural practices) is supported by the three arguments from analogy concerning the character of play, the festival and the symbol."