body snatcher vs stealer

body snatcher and stealer both are nouns.

Word	Noun	Adjective	Verb	Adverb
body snatcher	Yes	No	No	No
stealer	Yes	No	No	No

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

body snatcher: 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 body snatcher include thief.

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