An ersatz good (German: [ɛɐ̯ˈzats] ) is a substitute good, especially one that is considered inferior to the good it replaces. It has particular connotations of wartime usage. Etymology. Ersatz is a German word meaning substitute or replacement. Although it is used as an adjective in English, it is a noun in German. In German orthography noun phrases formed are usually represented as a single word, forming compound nouns such as Ersatzteile ("spare parts") or Ersatzspieler ("substitute player").
https://en.wikipedia.org/wiki/Ersatz_good