American chameleon vs iguanid

American chameleon and iguanid both are nouns.

Word	Noun	Adjective	Verb	Adverb
American chameleon	Yes	No	No	No
iguanid	Yes	No	No	No

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

American chameleon: small arboreal tropical American insectivorous lizards with the ability to change skin color
iguanid: lizards of the New World and Madagascar and some Pacific islands; typically having a long tail and bright throat patch in males

Other hypernyms of American chameleon include iguanid lizard.

American chameleon (noun)	iguanid (noun)
small arboreal tropical American insectivorous lizards with the ability to change skin color	lizards of the New World and Madagascar and some Pacific islands; typically having a long tail and bright throat patch in males