Jekyll and Hyde vs anomaly

Jekyll and Hyde and anomaly both are nouns.

Word	Noun	Adjective	Verb	Adverb
Jekyll and Hyde	Yes	No	No	No
anomaly	Yes	No	No	No

As nouns, anomaly is a hypernym of Jekyll and Hyde; that is, anomaly is a word with a broader meaning than Jekyll and Hyde:

Other hypernyms of Jekyll and Hyde include unusual person.

Jekyll and Hyde (noun)	anomaly (noun)
someone with two personalities - one good and one evil	(astronomy) position of a planet as defined by its angular distance from its perihelion (as observed from the sun)
	a person who is unusual
	deviation from the normal or common order or form or rule