fresh food vs solid food

fresh food and solid food both are nouns.

Word	Noun	Adjective	Verb	Adverb
fresh food	Yes	No	No	No
solid food	Yes	No	No	No

As nouns, solid food is a hypernym of fresh food; that is, solid food is a word with a broader meaning than fresh food:

fresh food: food that is not preserved by canning or dehydration or freezing or smoking
solid food: any solid substance (as opposed to liquid) that is used as a source of nourishment

Other hypernyms of fresh food include food.

fresh food (noun)	solid food (noun)
food that is not preserved by canning or dehydration or freezing or smoking	any solid substance (as opposed to liquid) that is used as a source of nourishment