food vs intellectual nourishment

food and intellectual nourishment both are nouns.

Word	Noun	Adjective	Verb	Adverb
food	Yes	No	No	No
intellectual nourishment	Yes	No	No	No

As nouns, food and intellectual nourishment are synonyms defined as:

food and intellectual nourishment: anything that provides mental stimulus for thinking

Other synonyms of food include food for thought.

food (noun)	intellectual nourishment (noun)
any substance that can be metabolized by an animal to give energy and build tissue	anything that provides mental stimulus for thinking
anything that provides mental stimulus for thinking
any solid substance (as opposed to liquid) that is used as a source of nourishment