firedrake vs mythical monster

firedrake and mythical monster both are nouns.

Word	Noun	Adjective	Verb	Adverb
firedrake	Yes	No	No	No
mythical monster	Yes	No	No	No

As nouns, mythical monster is a hypernym of firedrake; that is, mythical monster is a word with a broader meaning than firedrake:

firedrake: a creature of Teutonic mythology; usually represented as breathing fire and having a reptilian body and sometimes wings
mythical monster: a monster renowned in folklore and myth

Other hypernyms of firedrake include mythical creature.

firedrake (noun)	mythical monster (noun)
a creature of Teutonic mythology; usually represented as breathing fire and having a reptilian body and sometimes wings	a monster renowned in folklore and myth