gonad vs egg

gonad and egg both are nouns.

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

As nouns, egg is a hyponym of gonad; that is, egg is a word with a more specific, narrower meaning than gonad:

gonad: a gland in which gametes (sex cells) are produced
egg: one of the two male reproductive glands that produce spermatozoa and secrete androgens

Other hyponyms of gonad include ovary, ovotestis, ball, ballock, bollock, nut, orchis, testicle, testis.

gonad (noun)	egg (noun)
a gland in which gametes (sex cells) are produced	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
	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

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