HaLeiVi: R’ Shlomo Zalman (Meorei Eish page 810, maybe 808) says that it was improper to use the word “Chashmal” for electricity, though it’s entirely possible that he was unaware of the Greek etymology (see a footnote on that page for an absolutely Pele’dik opinion, by the way).
Golfer: The Rambam very famously says that Ma’aseh B’reishis and Ma’aseh Merkava are natural physics and Aristotelian metaphysics. The Gra very famously says that the Rambam is quite wrong. (Well, almost everyone disagrees with this Ramabam; the Gra just says it most sharply.)