orphanage vs orphans' asylum

orphanage and orphans' asylum both are nouns.

Word	Noun	Adjective	Verb	Adverb
orphanage	Yes	No	No	No
orphans' asylum	Yes	No	No	No

As nouns, orphanage and orphans' asylum are synonyms defined as:

orphanage and orphans' asylum: a public institution for the care of orphans

orphanage (noun)	orphans' asylum (noun)
a public institution for the care of orphans	a public institution for the care of orphans
the condition of being a child without living parents