bollock vs testis

bollock and testis both are nouns.

Word	Noun	Adjective	Verb	Adverb
bollock	Yes	No	No	No
testis	Yes	No	No	No

As nouns, bollock and testis are synonyms defined as:

bollock and testis: one of the two male reproductive glands that produce spermatozoa and secrete androgens

Other synonyms of bollock include ball, ballock, egg, nut, orchis, testicle.

bollock (noun)	testis (noun)
a pulley-block at the head of a topmast	one of the two male reproductive glands that produce spermatozoa and secrete androgens
one of the two male reproductive glands that produce spermatozoa and secrete androgens