idea vs cognitive content

idea and cognitive content both are nouns.

Word	Noun	Adjective	Verb	Adverb
idea	Yes	No	No	No
cognitive content	Yes	No	No	No

As nouns, cognitive content is a hypernym of idea; that is, cognitive content is a word with a broader meaning than idea:

idea: the content of cognition; the main thing you are thinking about
cognitive content: the sum or range of what has been perceived, discovered, or learned

Other hypernyms of idea include content, mental object.

idea (noun)	cognitive content (noun)
the content of cognition; the main thing you are thinking about	the sum or range of what has been perceived, discovered, or learned
your intention; what you intend to do
an approximate calculation of quantity or degree or worth
a personal view
(music) melodic subject of a musical composition