guereza vs colobus monkey

guereza and colobus monkey both are nouns.

Word	Noun	Adjective	Verb	Adverb
guereza	Yes	No	No	No
colobus monkey	Yes	No	No	No

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

guereza: a colobus monkey with a reddish brown coat and white silky fringes down both sides of the body
colobus monkey: arboreal monkey of western and central Africa with long silky fur and reduced thumbs

Other hypernyms of guereza include colobus.

guereza (noun)	colobus monkey (noun)
a colobus monkey with a reddish brown coat and white silky fringes down both sides of the body	arboreal monkey of western and central Africa with long silky fur and reduced thumbs