What is another word for simultaneousness?
Pronunciation: [sˌɪməltˈe͡ɪni͡əsnəs] (IPA) 
Simultaneousness is a complex word that describes the state of two or more events happening at the same time. There are several synonyms that can be used to convey the same meaning, including simultaneity, concurrence, synchronicity, coexistence, collocation, and coincidence. Simultaneity is a more formal synonym that refers to the quality of occurring at the same moment. On the other hand, synchronicity implies more of a relationship between events than merely occurring at the same time. Concurrence and coexistence emphasize the idea of events or situations existing together. Collocation and coincidence highlight the accidental nature of events that happen simultaneously. Each synonym conveys slightly different nuances while retaining the fundamental sense of simultaneousness.
