I frequently use the loci method (memory palace) to learn vocabulary, but I find that after 150-200 words my house is full with words/images and there is no space left. I know of people who can remember much longer lists, but I don't understand how they do this as I run out of space. Do they just use an extremely long walk? Do they use an imaginary memory palace that they can make as big as they want? I tried creating a fictional palace but it doesn't seem to have the same effect.
Googling only gives me basic examples of using short lists but I want to remember 1000-10000 words. How can I remember so many words using a memory technique?