With object-oriented programs, it’s easy to extend them by adding a new class of object. And it’s easy to add a function to one class… though you then have to consider all its children. It’s hard to add a new feature in a broad way, like serialization or access control: you have to change each of your class definitions, likely every file in your program. So nouns are easy, but new verbs are hard.
With functional programs, it’s hard to add a new sort of noun to the world, but easy to add a new sort of verb. Since I tend to program in Unix-like environments, this is nice: I know generally what sorts of noun I’ll be dealing with. I write programs to add new verbs to my vocabulary.