Should this be under 'impressionism' instead? The original link was singular rather than Impressionists (which is a common thing). But should it be the '-ism'? I am agnostic - feel free to move it if you change all the occurrences, or to discuss this with me. As far as I can tell 'Realism' is not occupied by some philosophy entry, and I'm going to need either Realist or Realism for the mid-19th century style that precedes Impressionism and of which Impressionism is perhaps a late variant. So, folks: -isms or -ists for painting movements?
Surely -ism for the movement, -ist for someone involved -e.g. Communism, communist; Cubism, cubist; Theism, theist etc etc
Impressionismistism. Let's cover all the bases. :-)
Seriously, -ism. If we need to we can break out "Neo-realism in art", "Neo-realism in philosophy" (or whatever) as separate entries.