Qual è la differenza tra pal e buddy e dude e friend ?Sentiti libero di rispondere con un esempio.

@DianaEs16: You can use any of them to mean the same thing (friend, amigo), depending on who you are talking to and who you are. "Pal" and "buddy" are enduring terms for "friend". These are sentimental terms, also often used when speaking to children, so some adults would never use them and you may sound odd using them depending on who you are talking about. Some people from the US may disagree.
"Dude" is similar, though it takes an even more particular type of personality to use "dude". "Dude" also does not always mean "friend" and it refers to a male person only, while the other words you mentioned can be used for either gender.
"Friend" is the safest word to use for "amigo" until you have a better understanding of the others.