manticore vs mythical monster

manticore and mythical monster both are nouns.

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

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

manticore: a mythical monster having the head of man (with horns) and the body of a lion and the tail of a scorpion
mythical monster: a monster renowned in folklore and myth

Other hypernyms of manticore include mythical creature.

manticore (noun)	mythical monster (noun)
a mythical monster having the head of man (with horns) and the body of a lion and the tail of a scorpion	a monster renowned in folklore and myth