Avitaminosis and Deficiency disease

Avitaminosis noun - Any of several diseases caused by deficiency of one or more vitamins.

Deficiency disease and avitaminosis are semantically related. In some cases you can use "Deficiency disease" instead a noun "Avitaminosis".

Deficiency disease noun - Any disease caused by a lack of an essential nutrient (as a vitamin or mineral).

Avitaminosis and deficiency disease are semantically related. You can use "Avitaminosis" instead a noun phrase "Deficiency disease".