I have never had any problems with them, but for me they have same meanings, therefore I want to know a really difference between them. My dictionaries did not give me a clear answer.
All my life I say: the whole world, but can I say: the full world or the complete world? They sound strange for me, but I don't see more differences than "strange sound".
Thanks in advance.
If I have made any mistakes, please tell me about them. I need to improve my English anyway and I hope you'll help me.