Bed of roses and Flower bed

Bed of roses noun - A flower bed in which roses are growing.

Flower bed and bed of roses are semantically related. In some cases you can use "Flower bed" instead a noun phrase "Bed of roses".

Flower bed noun - A bed in which flowers are growing.

Bed of roses and flower bed are semantically related. Sometimes you can replace phrase "Bed of roses" with "Flower bed", this phrases are similar.