male genitalia vs male genitals

male genitalia and male genitals both are nouns.

Word	Noun	Adjective	Verb	Adverb
male genitalia	Yes	No	No	No
male genitals	Yes	No	No	No

As nouns, male genitalia and male genitals are synonyms defined as:

Other synonyms of male genitalia include family jewels, male genital organ.

male genitalia (noun)	male genitals (noun)
external male sex organs	external male sex organs