mountain devil vs spiny lizard

mountain devil and spiny lizard both are nouns.

Word	Noun	Adjective	Verb	Adverb
mountain devil	Yes	No	No	No
spiny lizard	Yes	No	No	No

As nouns, mountain devil and spiny lizard are synonyms defined as:

Other synonyms of mountain devil include Moloch horridus.

mountain devil (noun)	spiny lizard (noun)
desert lizard that feeds on ants	any of numerous lizards with overlapping ridged pointed scales; of North America and Central America
erect bushy shrub of eastern Australia having terminal clusters of red flowers yielding much nectar	desert lizard that feeds on ants