The IAU Division 1 Working Group on ''Nomenclature for Fundamental Astronomy'' (NFA) was established by the 25th IAU General Assembly with the task of preparing a consistent and well defined terminology associated with the implementation of the IAU 2000 resolutions on reference systems. This WG is also intended to make related educational efforts to address the issue to the large community of scientists. In this paper, we recall the main nomenclature issues and report on the latest NFA WG recommendations on terminology choices and guidelines that have been supported by explanatory documents, including a NFA IAU 2000 Glossary. In order to introduce the astronomical community to the main NFA recommendations, a WG Resolution proposal will be submitted to the IAU 2006 General Assembly as a supplement to the IAU 2000 resolutions for harmonizing the name of the pole and origin to ''intermediate'' and for specifying the default orientation of the BCRS and GCRS.