By an extraordinary coincidence I have, just before coming to AB been looking at this;
https://learningenglish.voanews.com/a/when-collecting-things-becomes-a-problem/1613736.html
I was doing so because a divorced man in our village who lives in a nice house has recently got a new partner who is filling the garden with junk.
Gardening mags sometimes show a 'feature' in a garden; an old wooden wheel barrow or an old Belfast sink etc. with flowers growing in it. She started with a bicycle on the lawn with flowers in the basket which seemed (on its own) fun, but over the Summer it has grown to epic proportions - & is now a junk yard of an old petrol pump, countless pots & pans, a wardrobe sans door and every day brings more c ra p.
I think she has a severe psychological problem & really needs help, that's why I was looking for what it might be termed as, it's called OCD, Compulsive hoarding syndrome