food for thought vs intellectual nourishment

food for thought and intellectual nourishment both are nouns.

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

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

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

Other synonyms of food for thought include food.

food for thought (noun)	intellectual nourishment (noun)
anything that provides mental stimulus for thinking	anything that provides mental stimulus for thinking