houri vs mythical being

houri and mythical being both are nouns.

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

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

houri: (Islam) one of the dark-eyed virgins of perfect beauty believed to live with the blessed in Paradise
mythical being: an imaginary being of myth or fable

houri (noun)	mythical being (noun)
a voluptuously beautiful young woman	an imaginary being of myth or fable
(Islam) one of the dark-eyed virgins of perfect beauty believed to live with the blessed in Paradise