"There are reasons for using words even when they are unfamiliar. It can be a matter of rhythm, it can be a matter of the exact fit--and it can be something by way of obeisance to the people whose honed verbal appetites created the need for such a word, which therefore came into being. Call it supply-side linguistics; but whatever you call it, pray be thankful that someone invented the word 'velleity' and that a few refuse to permit it to die, even as others would die to preserve the lousewort." - William F. Buckley, On the Right, May 15, 1984.

Indeed.