catarrhine vs Old World monkey

catarrhine and Old World monkey both are nouns.

Word	Noun	Adjective	Verb	Adverb
catarrhine	Yes	Yes	No	No
Old World monkey	Yes	No	No	No

As nouns, catarrhine and Old World monkey are synonyms defined as:

catarrhine and Old World monkey: of Africa or Arabia or Asia; having nonprehensile tails and nostrils close together

catarrhine (noun)	Old World monkey (noun)
of Africa or Arabia or Asia; having nonprehensile tails and nostrils close together	of Africa or Arabia or Asia; having nonprehensile tails and nostrils close together

catarrhine (adjective)	Old World monkey (adjective)
of or related to Old World monkeys that have nostrils together and opening downward