golem vs mythical being

golem and mythical being both are nouns.

Word	Noun	Adjective	Verb	Adverb
golem	Yes	No	No	No
mythical being	Yes	No	No	No

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

golem: (Jewish folklore) an artificially created human being that is given life by supernatural means
mythical being: an imaginary being of myth or fable

golem (noun)	mythical being (noun)
a mechanism that can move automatically	an imaginary being of myth or fable
(Jewish folklore) an artificially created human being that is given life by supernatural means