Macaca mulatta vs rhesus monkey

Macaca mulatta and rhesus monkey both are nouns.

Word	Noun	Adjective	Verb	Adverb
Macaca mulatta	Yes	No	No	No
rhesus monkey	Yes	No	No	No

As nouns, Macaca mulatta and rhesus monkey are synonyms defined as:

Macaca mulatta and rhesus monkey: of southern Asia; used in medical research

Other synonyms of Macaca mulatta include rhesus.

Macaca mulatta (noun)	rhesus monkey (noun)
of southern Asia; used in medical research	of southern Asia; used in medical research