lactalbumin vs albumen

lactalbumin and albumen both are nouns.

Word	Noun	Adjective	Verb	Adverb
lactalbumin	Yes	No	No	No
albumen	Yes	No	No	No

As nouns, albumen is a hypernym of lactalbumin; that is, albumen is a word with a broader meaning than lactalbumin:

lactalbumin: albumin occurring in milk
albumen: a simple water-soluble protein found in many animal tissues and liquids

Other hypernyms of lactalbumin include albumin.

lactalbumin (noun)	albumen (noun)
albumin occurring in milk	the white part of an egg; the nutritive and protective gelatinous substance surrounding the yolk consisting mainly of albumin dissolved in water
	a simple water-soluble protein found in many animal tissues and liquids