egg vs yolk

egg and yolk both are nouns.

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

egg (noun)	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	nutritive material of an ovum stored for the nutrition of an embryo (especially the yellow mass of a bird or reptile egg)
one of the two male reproductive glands that produce spermatozoa and secrete androgens	the yellow spherical part of an egg that is surrounded by the albumen
oval reproductive body of a fowl (especially a hen) used as food

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