It seems like you might be trying to describe a type of noun, but there's no specific category called "idea nouns."
Here are some possibilities of what you might be looking for:
* Abstract nouns: These represent concepts, ideas, feelings, qualities, and states of being. Examples include: *love, justice, freedom, happiness, anger, beauty*.
* Collective nouns: These refer to a group of people, animals, or things. Examples include: *team, family, flock, crowd, jury*.
* Proper nouns: These refer to specific people, places, or things. They are capitalized. Examples include: *John, London, The United States*.
If you can provide more context or an example of what you mean by "idea nouns," I can help you understand the term better.