Apart from naming that has evolved a bit since LOTR which was more or a literal discription of the place in the name "Mount Doom" a mountine of doom :biggrin:
I hope you're kidding! Tolkien had like 3 different names for everything, sometimes more, in different made up languages and all sorts. He wrote it so different cultures called it different things... Mount Doom / The Mountain Of Fire was the closest english translation used by the main, more relatable characters ( hobbits ) because of their culture, and I suppose that stuck for the movie because it's 'catchy'. I'm not trying to be a whiny [censored] about it, I just don't think it's fair to imply that Tolkien, of all people, put little thought into his naming conventions...
Oh, and Morrowind's main volcano, Dagoth-Ur, was called 'Red Mountain'