service entrance vs servant's entrance

service entrance and servant's entrance both are nouns.

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

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

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

Other synonyms of service entrance include service door.

service entrance (noun)	servant's 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