I'm sure I can think of a few old words - some obvious, such as "half a crown", "suspender belt", "telephone exchange" or "horizontal hold" - and will come back later if I think of any more.
I've lived in Germany for so long now, that I have even been accused of using outdated German words, or words that my (younger) colleagues haven't even heard of. More than once I have asked a young shop assistant for something to be met with blank looks - such as "Kurzwaren" - the German for "haberdashery", or the beautiful word "Quaste" - a tassel.
Regarding "frock", however - I find it a rather ugly word and my father, who was in the ladies' clothing business, forbade us to use it. I'm not sure why, but I've kept to that all my life.
He also had an aversion to the word "stuff" for material, which I would never use, even now, despite the fact that the German word for "material/fabric" IS "Stoff".