stealer vs thief

stealer and thief both are nouns.

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

As nouns, stealer and thief are synonyms defined as:

stealer and thief: a criminal who takes property belonging to someone else with the intention of keeping it or selling it

stealer (noun)	thief (noun)
a criminal who takes property belonging to someone else with the intention of keeping it or selling it	a criminal who takes property belonging to someone else with the intention of keeping it or selling it