synchroneity

[ sing-kruh-nee-i-tee, -ney- ]
/ ˌsɪŋ krəˈni ɪ ti, -ˈneɪ- /

noun

the state of being synchronous; synchronism.

Origin of synchroneity

1905–10; synchron(ous) + -eity, as in simultaneity, spontaneity