dragon lizard vs giant lizard

dragon lizard and giant lizard both are nouns.

Word	Noun	Adjective	Verb	Adverb
dragon lizard	Yes	No	No	No
giant lizard	Yes	No	No	No

As nouns, dragon lizard and giant lizard are synonyms defined as:

dragon lizard and giant lizard: the largest lizard in the world (10 feet); found on Indonesian islands

Other synonyms of dragon lizard include Komodo dragon, Komodo lizard, Varanus komodoensis.

dragon lizard (noun)	giant lizard (noun)
the largest lizard in the world (10 feet); found on Indonesian islands	the largest lizard in the world (10 feet); found on Indonesian islands