mountain devil vs moloch

mountain devil and moloch both are nouns.

Word	Noun	Adjective	Verb	Adverb
mountain devil	Yes	No	No	No
moloch	Yes	No	No	No

As nouns, moloch is a hypernym of mountain devil; that is, moloch is a word with a broader meaning than mountain devil:

mountain devil (noun)	moloch (noun)
desert lizard that feeds on ants	any lizard of the genus Moloch
erect bushy shrub of eastern Australia having terminal clusters of red flowers yielding much nectar