harem vs serail

harem and serail both are nouns.

Word	Noun	Adjective	Verb	Adverb
harem	Yes	No	No	No
serail	Yes	No	No	No

As nouns, harem and serail are synonyms defined as:

harem and serail: living quarters reserved for wives and concubines and female relatives in a Muslim household

Other synonyms of harem include hareem, seraglio.

harem (noun)	serail (noun)
living quarters reserved for wives and concubines and female relatives in a Muslim household	living quarters reserved for wives and concubines and female relatives in a Muslim household