guereza vs colobus

guereza and colobus both are nouns.

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

As nouns, colobus is a hypernym of guereza; that is, colobus 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: arboreal monkey of western and central Africa with long silky fur and reduced thumbs

Other hypernyms of guereza include colobus monkey.

guereza (noun)	colobus (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