I personally saw how novice Python programmers searched for “Python compiler” while their actual intent was to find Python REPL/execution environment online (pythontutor, ideone, repl.it, trinket.io, etc)
Many of this services use “compiler” in their description. It may be technically true if they use Python implementation that compiles Python source to byte code first, and then interprets the resulting bytecode (like CPython, Pypy implementation do).
You're right, it's an interpreter and that would be the 100% accurate term.
For online coding environments, the two are often used interchangeably. More people search for 'compiler', so I'm using that widely on my site.