I guess access modifiers (8.5.1), or class modifiers (JLS 8.1.1) or field modifiers (8.3.1) are just terms used to refer to a subset of the whole set of
Java modifiers.
Hence I share Marc's assessment that they are all part of the same thing.
I could not find the term specifier in the JLS, at least not in paragraph referring to a modifier as if they were interchangeable terms.
[ April 15, 2006: Message edited by: Edwin Dalorzo ]