Morteza N. answered 11/25/19
Hello my dear friend! I would be very happy to help you distinguish between these to words:
عفریت or Efrit is not same as هیولا because the word ifrit is a powerful type of demon in Islamic mythology and often associated with the underworld and also identified with t he spirit of the dead and had been compare with Evil, and would pronounce as follow: /'efrit/
On the other hand the word هیولا is very close to monster and is pronounce like this: /hayulā/
If you have more question let me know.