I’ve written about several cases where Americans have adopted the British tendency to pluralize attributive nouns: to use drugs party, covers band, drinks menu, and books editor instead of the customary/traditional “drug party,” “cover band,” “drink menu,” and “book editor.” Check out those links if you’re interested in the ins and outs of the issue.
The latest instance comes via a current National Public Radio (NPR) corporate underwriting spot, intoned by the same plummy-sounding woman who (in another spot) talks about “what-if scenahhrios.” In this one, for Amazon Business, she touts the way it “helps simplify the supplies-buying process with a one-stop shopping experience.” The typical American term, I submit, would be “supply-buying process.”
I acknowledge that I can’t prove that. Both variations of the phrase are uncommon enough that Ngram Viewer and other tools aren’t able to shed much light. However, I can report that “supply buying” has been used nine times in the history of the New York Times and “supplies buying,” as of now, has never appeared in the paper.
If anyone thinks I’m off-base here, please have at me. (Not that you required encouragement.)