egg white vs fixings

egg white and fixings both are nouns.

Word	Noun	Adjective	Verb	Adverb
egg white	Yes	No	No	No
fixings	Yes	No	No	No

As nouns, fixings is a hypernym of egg white; that is, fixings is a word with a broader meaning than egg white:

egg white: the white part of an egg; the nutritive and protective gelatinous substance surrounding the yolk consisting mainly of albumin dissolved in water
fixings: food that is a component of a mixture in cooking

Other hypernyms of egg white include ingredient.

egg white (noun)	fixings (noun)
the white part of an egg; the nutritive and protective gelatinous substance surrounding the yolk consisting mainly of albumin dissolved in water	the accessories that normally accompany (something or some activity)
	food that is a component of a mixture in cooking