varan vs lizard

varan and lizard both are nouns.

Word	Noun	Adjective	Verb	Adverb
varan	Yes	No	No	No
lizard	Yes	No	No	No

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

varan: any of various large tropical carnivorous lizards of Africa and Asia and Australia; fabled to warn of crocodiles
lizard: relatively long-bodied reptile with usually two pairs of legs and a tapering tail

varan (noun)	lizard (noun)
any of various large tropical carnivorous lizards of Africa and Asia and Australia; fabled to warn of crocodiles	relatively long-bodied reptile with usually two pairs of legs and a tapering tail
	a man who idles about in the lounges of hotels and bars in search of women who would support him