Bollock is a slang term often used to refer to male genitals. However, it is not a word that is accepted in formal settings. Some of the synonyms for bollock include testicles, balls, nuts, stones, gonads, or privates. While these terms do not have the same negative connotations as bollock, they should still be used carefully in conversations.
In professional settings or public spaces, it is best to stick to neutral terms, especially when discussing sensitive topics. Using slang or derogatory words may cause discomfort or offense to other people. Using synonyms like testicles or genitals may also be more appropriate in medical or academic settings.