griffon vs mythical monster

griffon and mythical monster both are nouns.

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

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

Other hypernyms of griffon include mythical creature.

griffon (noun)	mythical monster (noun)
breed of various very small compact wiry-coated dogs of Belgian origin having a short bearded muzzle	a monster renowned in folklore and myth
breed of medium-sized long-headed dogs with downy undercoat and harsh wiry outer coat; originated in Holland but largely developed in France
large vulture of southern Europe and northern Africa having pale plumage with black wings
winged monster with the head of an eagle and the body of a lion