convenience food vs solid food

convenience food and solid food both are nouns.

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

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

convenience food: any packaged dish or food that can be prepared quickly and easily as by thawing or heating
solid food: any solid substance (as opposed to liquid) that is used as a source of nourishment

Other hypernyms of convenience food include food.

convenience food (noun)	solid food (noun)
any packaged dish or food that can be prepared quickly and easily as by thawing or heating	any solid substance (as opposed to liquid) that is used as a source of nourishment