Bedridden and Flat on one's back

Bedridden adjective - Confined to bed (by illness).

Flat on one's back and bedridden are semantically related. in laid up topic. In some cases you can use "Flat on one's back" instead an adjective "Bedridden". informal substitute

Bedridden and flat on one's back are semantically related. Sometimes you can replace term "Bedridden" with "Flat on one's back", this terms are similar.