What do you mean by "pumps". Where I'm from in the UK it means very basic trainers (USA: sneakers), like plimsolls. Something like a Converse Allstar, say.
I've got to assume from the context you mean 'high-heeled shoes'?
Where I live indeed naaldhakken are called pumps as well. I hence, maybe uncorrectly, assumed it is an English word... Flemish/Dutch is so full of English words.
We use words like sneakers, shorts, wonderbra, jeans, hoodie,... often there is no Dutch alternative even.
