Bananas, tomatoes, and apples are the ripened ovary of a flowering plant. There's more similarity than difference, thus the word "fruit" has real meaning.
Copyright, patent, and trademark have very little in common. The only thing they have in common is that they are all government imposed monopolies.
Copyright and patent might be described as "intellectual", but that makes no sense for trademark. None of them are property. There's more difference than similarity, thus the term "intellectual property" has little, if any meaning.