Junk food and Solid food

Junk food noun - Food that tastes good but is high in calories having little nutritional value.

Solid food and junk food are semantically related. In some cases you can use "Solid food" instead a noun phrase "Junk food".

Solid food noun - Any solid substance (as opposed to liquid) that is used as a source of nourishment.

Junk food and solid food are semantically related. Sometimes you can replace phrase "Junk food" with "Solid food", this phrases are similar.