woolly monkey vs platyrrhine

woolly monkey and platyrrhine both are nouns.

Word	Noun	Adjective	Verb	Adverb
woolly monkey	Yes	No	No	No
platyrrhine	Yes	Yes	No	No

As nouns, platyrrhine is a hypernym of woolly monkey; that is, platyrrhine is a word with a broader meaning than woolly monkey:

woolly monkey: large monkeys with dark skin and woolly fur of the Amazon and Orinoco basins
platyrrhine: hairy-faced arboreal monkeys having widely separated nostrils and long usually prehensile tails

Other hypernyms of woolly monkey include New World monkey, platyrrhinian.

woolly monkey (noun)	platyrrhine (noun)
large monkeys with dark skin and woolly fur of the Amazon and Orinoco basins	hairy-faced arboreal monkeys having widely separated nostrils and long usually prehensile tails

woolly monkey (adjective)	platyrrhine (adjective)
	of or related to New World monkeys having nostrils far apart or to people with broad noses