lazaretto vs pesthouse

lazaretto and pesthouse both are nouns.

Word	Noun	Adjective	Verb	Adverb
lazaretto	Yes	No	No	No
pesthouse	Yes	No	No	No

As nouns, lazaretto and pesthouse are synonyms defined as:

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

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

lazaretto (noun)	pesthouse (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