I am looking up these two words and they seem to have the same meaning. I thought that they mean same.Reading one of each definitions of these below, I undestood they meant same.
unparalleled - bigger, better, or worse than anything else
Longman Dictionary of Contemporary English | LDOCEunprecedented - never having happened before, or never having happened so much
Longman Dictionary of Contemporary English | LDOCE
But (some) people tell me that they don't mean the same. I don't know how to see the words to make myself understand that they mean different. From what perspective can I also see that they mean different? For me, they are the same like these two sentences below mean the same.
This is more exciting than any other thing that I have experienced.
I have never felt this excited.
Both sentences end up meaning "This is the most exciting thing.", right? Any obvious answer or comment is helpful.