vervet monkey vs Cercopithecus aethiops pygerythrus

vervet monkey and Cercopithecus aethiops pygerythrus both are nouns.

Word	Noun	Adjective	Verb	Adverb
vervet monkey	Yes	No	No	No
Cercopithecus aethiops pygerythrus	Yes	No	No	No

As nouns, vervet monkey and Cercopithecus aethiops pygerythrus are synonyms defined as:

vervet monkey and Cercopithecus aethiops pygerythrus: South African monkey with black face and hands

Other synonyms of vervet monkey include vervet.

vervet monkey (noun)	Cercopithecus aethiops pygerythrus (noun)
South African monkey with black face and hands	South African monkey with black face and hands