That gold thing on the end of your pen that applies ink to the paper: that’s the nib, right? Most of us these days would agree that’s what it’s called, but not everyone. A regular poster in FPN has insisted for several years that it is the “point.” Eccentricity? Perhaps, but it does have historical authority.
Reading old Waterman publicity material yesterday, in one advertisement the nib was called both the “point” and the “pen.” That advert was as recent as 1933, though I think the “pen” might have been something of an anachronism even then.
So which is it? I think it’s a nib. Language changes and these other names are no longer specific enough. A “pen” now is the whole writing instrument and a “point” is not as good a name as a “nib”. Many things have points but only a fountain pen has a nib. Specificity wins the day!