I know these two sentences are somehow different, but I don't know how:
This is an everlasting love.
This is an eternal love.
I read here that there are a number of adjectives for withstanding the passage of time. But it didn't specifically say the difference.
Best Answer
I've consulted several different dictionaries, and all say pretty much that both words mean the same thing. At first, I thought that "eternal" may indicate no start or end, while "everlasting" only specifies no end. But that is NOT the case. My Random House Websters College Dictionary (2001) lists "eternal" as a synonym for everlasting. The American Heritage Dictionary of the English Language 3rd edition (1992) lists "everlasting" as a synonym for eternal. My Merriam-Webster's Collegiate Dictionary 10th Edition (1996) lists each word as a synonym for the other.
Having said that, this response is admittedly subjective. I think the main difference is in connotation. Part of that connotation is endpoint. Eternal seems to emphasize no start or end, while everlasting emphasizes the lack of ending. Also, in my mind, "eternal" has a sense of stillness and lack of change. While "everlasting" has a more dynamic and vibrant feel.