Can there exist something that subsidises that is not a subsidy Is the set of subsidies exactly the same as the set of things that subsidise?

Put another way: can there exist something that subsidises that is not a subsidy?

Or are there two definitions of a subsidy: the narrow economic definition, and a wider definition that includes (for example) everything that has the effect of a subsidy.
My answer relies on two quotes. The first one:


  A rose by any other name would smell as sweet


And the second one is from the definition of State Aid by the European Union's competition authority:


  State aid is defined as an advantage in any form whatsoever conferred on a selective basis to undertakings by national public authorities. 


There is a difference between illegal state aid and subsidies, but the difference is in the "selective basis". Aid in any form that confers an advantage is aid.