egg vs egg yolk

egg and egg yolk both are nouns.

Word	Noun	Adjective	Verb	Adverb
egg	Yes	No	Yes	No
egg yolk	Yes	No	No	No

egg (noun)	egg yolk (noun)
animal reproductive body consisting of an ovum or embryo together with nutritive and protective envelopes; especially the thin-shelled reproductive body laid by e.g. female birds	the yellow spherical part of an egg that is surrounded by the albumen
one of the two male reproductive glands that produce spermatozoa and secrete androgens
oval reproductive body of a fowl (especially a hen) used as food

egg (verb)	egg yolk (verb)
coat with beaten egg
throw eggs at