BUR #17443 has been rejected.
create alias inverted_umbrella -> upturned_umbrella
create alias inside-out_umbrella -> upturned_umbrella
this tag is pretty difficult to find due to its shared nomenclature with precisely two unpopular and relatively uncommon tags. a utility alias would at least make it easier to find; maybe the other common alternative "inside-out" should be added too. in the case of switching the main name I would prefer inverted umbrella over inside-out umbrella, but really either sounds better than "upturned" imo.
both names would conflict with this particular type of umbrella, but because they are visually indistinct other than opening/closing I don't see this ever becoming a problem.