defalcator vs thief

defalcator and thief both are nouns.

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

As nouns, thief is a hypernym of defalcator; that is, thief is a word with a broader meaning than defalcator:

defalcator: someone who violates a trust by taking (money) for his own use
thief: a criminal who takes property belonging to someone else with the intention of keeping it or selling it

Other hypernyms of defalcator include beguiler, cheat, cheater, deceiver, slicker, trickster, stealer.

defalcator (noun)	thief (noun)
someone who violates a trust by taking (money) for his own use	a criminal who takes property belonging to someone else with the intention of keeping it or selling it