What can be said about now? Now is time sensitive, right this second; Do it now!. That tells me that now has power, the power to demand an action be done.
Another word with power Forthwith, immediately without delay. Sometime is power but not as strong of a power as the aforesaid words are.
I think I will look into the etymology of some words. I really have never looked at it in the was that I did before. I did it again I learned something that I did not know. Really two things I also learned how to spell etymology. lol. Knowledge is so wonderful but in my case so late in the game.