Syncnicity

So my boyfriend and I have this ongoing argument about what word would be best to define "the condition of being in sync." The words I've come up with are insyncness and syncnicity, but he insists on syncage.


Please comment and let me know which of these words fits best so we can finally settle this. Also, feel free to let me know if there is already an established word for this so we don't have to make up one!


Happy blogging! :)