ICG's Dictionary of Glass-making, gives ground base, puntied base, and the verb puntying, for the grinding of the base.
Don't know if you can assume puntier.The dictionary also refers, in the section on cutting and polishing of glass to the terms, flatter, and stoner for occupations. Both of these last, appear to be terms covered by BS3447:1962, and BS 952:1953, which has been superceded by BS 952 1: 1980
Regards,
Marcus