pesthouse vs lazar house

pesthouse and lazar house both are nouns.

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

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

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

Other synonyms of pesthouse include lazaret, lazarette, lazaretto.

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