In Japanese, there is no difference in definition between fun and interesting in their adjective forms. I know that fun also has a noun and verb form in English, but I am wondering is there any difference between "fun" (adjective definition) and "interesting"?
In all honesty, they appear to mean the same thing. Is there a time when you can replace one word with the other to have a completely different meaning?
EDIT: To explain myself a little bit more, interesting is defined as attracting your attention in Merriam Webster. When can something be fun and not attract your attention? In this sense, I feel as if fun encompasses interesting.