chuckwalla vs iguanid

chuckwalla and iguanid both are nouns.

Word	Noun	Adjective	Verb	Adverb
chuckwalla	Yes	No	No	No
iguanid	Yes	No	No	No

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

chuckwalla: a herbivorous lizard that lives among rocks in the arid parts of southwestern United States and Mexico
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 chuckwalla include iguanid lizard.

chuckwalla (noun)	iguanid (noun)
a herbivorous lizard that lives among rocks in the arid parts of southwestern United States and Mexico	lizards of the New World and Madagascar and some Pacific islands; typically having a long tail and bright throat patch in males