African monitor vs varan

African monitor and varan both are nouns.

Word	Noun	Adjective	Verb	Adverb
African monitor	Yes	No	No	No
varan	Yes	No	No	No

As nouns, varan is a hypernym of African monitor; that is, varan is a word with a broader meaning than African monitor:

African monitor: destroys crocodile eggs
varan: any of various large tropical carnivorous lizards of Africa and Asia and Australia; fabled to warn of crocodiles

Other hypernyms of African monitor include monitor, monitor lizard.

African monitor (noun)	varan (noun)
destroys crocodile eggs	any of various large tropical carnivorous lizards of Africa and Asia and Australia; fabled to warn of crocodiles