pubes vs pubic region

pubes and pubic region both are nouns.

Word	Noun	Adjective	Verb	Adverb
pubes	Yes	No	No	No
pubic region	Yes	No	No	No

As nouns, pubes and pubic region are synonyms defined as:

pubes and pubic region: the lower part of the abdomen just above the external genital organs

Other synonyms of pubes include loins.

pubes (noun)	pubic region (noun)
the lower part of the abdomen just above the external genital organs	the lower part of the abdomen just above the external genital organs