lazar house vs lazaretto

lazar house and lazaretto both are nouns.

Word	Noun	Adjective	Verb	Adverb
lazar house	Yes	No	No	No
lazaretto	Yes	No	No	No

As nouns, lazar house and lazaretto are synonyms defined as:

lazar house and lazaretto: hospital for persons with infectious diseases (especially leprosy)

Other synonyms of lazar house include lazaret, lazarette, pesthouse.

lazar house (noun)	lazaretto (noun)
hospital for persons with infectious diseases (especially leprosy)	hospital for persons with infectious diseases (especially leprosy)
	a small locker at the stern of a boat or between decks of a ship