chameleon vs lizard

chameleon and lizard both are nouns.

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

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

chameleon: lizard of Africa and Madagascar able to change skin color and having a projectile tongue
lizard: relatively long-bodied reptile with usually two pairs of legs and a tapering tail

chameleon (noun)	lizard (noun)
lizard of Africa and Madagascar able to change skin color and having a projectile tongue	relatively long-bodied reptile with usually two pairs of legs and a tapering tail
a changeable or inconstant person	a man who idles about in the lounges of hotels and bars in search of women who would support him