avitaminosis vs malnutrition

avitaminosis and malnutrition both are nouns.

Word	Noun	Adjective	Verb	Adverb
avitaminosis	Yes	No	No	No
malnutrition	Yes	No	No	No

As nouns, malnutrition is a hypernym of avitaminosis; that is, malnutrition is a word with a broader meaning than avitaminosis:

avitaminosis: any of several diseases caused by deficiency of one or more vitamins
malnutrition: a state of poor nutrition; can result from insufficient or excessive or unbalanced diet or from inability to absorb foods

avitaminosis (noun)	malnutrition (noun)
any of several diseases caused by deficiency of one or more vitamins	a state of poor nutrition; can result from insufficient or excessive or unbalanced diet or from inability to absorb foods