ballock vs gonad

ballock and gonad both are nouns.

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

As nouns, gonad is a hypernym of ballock; that is, gonad is a word with a broader meaning than ballock:

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

Other hypernyms of ballock include sex gland, male reproductive gland.

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