Light bread and White-bread

Light bread noun - Bread made with finely ground and usually bleached wheat flour.

White-bread and light bread are semantically related. In some cases you can replace phrase "White-bread" with "Light bread", this phrases are similar.

White-bread adjective - Of or belonging to or representative of the white middle class.

Light bread and white-bread are semantically related. You can use "Light bread" instead a noun phrase "White-bread".