titi monkey vs platyrrhinian

titi monkey and platyrrhinian both are nouns.

Word	Noun	Adjective	Verb	Adverb
titi monkey	Yes	No	No	No
platyrrhinian	Yes	Yes	No	No

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

titi monkey: small South American monkeys with long beautiful fur and long nonprehensile tail
platyrrhinian: hairy-faced arboreal monkeys having widely separated nostrils and long usually prehensile tails

Other hypernyms of titi monkey include New World monkey, platyrrhine.

titi monkey (noun)	platyrrhinian (noun)
small South American monkeys with long beautiful fur and long nonprehensile tail	hairy-faced arboreal monkeys having widely separated nostrils and long usually prehensile tails

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