ghoul vs stealer

ghoul and stealer both are nouns.

Word	Noun	Adjective	Verb	Adverb
ghoul	Yes	No	No	No
stealer	Yes	No	No	No

As nouns, stealer is a hypernym of ghoul; that is, stealer is a word with a broader meaning than ghoul:

ghoul: someone who takes bodies from graves and sells them for anatomical dissection
stealer: a criminal who takes property belonging to someone else with the intention of keeping it or selling it

Other hypernyms of ghoul include thief.

ghoul (noun)	stealer (noun)
an evil spirit or ghost	a criminal who takes property belonging to someone else with the intention of keeping it or selling it
someone who takes bodies from graves and sells them for anatomical dissection