crab-eating macaque vs croo monkey

crab-eating macaque and croo monkey both are nouns.

Word	Noun	Adjective	Verb	Adverb
crab-eating macaque	Yes	No	No	No
croo monkey	Yes	No	No	No

As nouns, crab-eating macaque and croo monkey are synonyms defined as:

crab-eating macaque and croo monkey: monkey of southeast Asia, Borneo and the Philippines

Other synonyms of crab-eating macaque include Macaca irus.

crab-eating macaque (noun)	croo monkey (noun)
monkey of southeast Asia, Borneo and the Philippines	monkey of southeast Asia, Borneo and the Philippines