lamia vs evil spirit

lamia and evil spirit both are nouns.

Word	Noun	Adjective	Verb	Adverb
lamia	Yes	No	No	No
evil spirit	Yes	No	No	No

As nouns, evil spirit is a hypernym of lamia; that is, evil spirit is a word with a broader meaning than lamia:

lamia: (folklore) a corpse that rises at night to drink the blood of the living
evil spirit: a spirit tending to cause harm

lamia (noun)	evil spirit (noun)
(folklore) a corpse that rises at night to drink the blood of the living	a spirit tending to cause harm