food vs soul food

food and soul food both are nouns.

Word	Noun	Adjective	Verb	Adverb
food	Yes	No	No	No
soul food	Yes	No	No	No

As nouns, soul food is a hyponym of food; that is, soul food is a word with a more specific, narrower meaning than food:

food: any substance that can be metabolized by an animal to give energy and build tissue
soul food: food traditionally eaten by African-Americans in the South

food (noun)	soul food (noun)
any substance that can be metabolized by an animal to give energy and build tissue	food traditionally eaten by African-Americans in the South
anything that provides mental stimulus for thinking
any solid substance (as opposed to liquid) that is used as a source of nourishment