pesthouse vs lazaret

pesthouse and lazaret both are nouns.

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

As nouns, pesthouse and lazaret are synonyms defined as:

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

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

pesthouse (noun)	lazaret (noun)
hospital for persons with infectious diseases (especially leprosy)	hospital for persons with infectious diseases (especially leprosy)