bonobo vs pygmy chimpanzee

bonobo and pygmy chimpanzee both are nouns.

Word	Noun	Adjective	Verb	Adverb
bonobo	Yes	No	No	No
pygmy chimpanzee	Yes	No	No	No

As nouns, bonobo and pygmy chimpanzee are synonyms defined as:

bonobo and pygmy chimpanzee: small chimpanzee of swamp forests in Zaire; a threatened species

Other synonyms of bonobo include Pan paniscus.

bonobo (noun)	pygmy chimpanzee (noun)
small chimpanzee of swamp forests in Zaire; a threatened species	small chimpanzee of swamp forests in Zaire; a threatened species