servant's entrance vs service entrance

servant's entrance and service entrance both are nouns.

Word	Noun	Adjective	Verb	Adverb
servant's entrance	Yes	No	No	No
service entrance	Yes	No	No	No

As nouns, servant's entrance and service entrance are synonyms defined as:

servant's entrance and service entrance: an entrance intended for the use of servants or for delivery of goods and removal of refuse

Other synonyms of servant's entrance include service door.

servant's entrance (noun)	service entrance (noun)
an entrance intended for the use of servants or for delivery of goods and removal of refuse	an entrance intended for the use of servants or for delivery of goods and removal of refuse