service entrance vs entryway

service entrance and entryway both are nouns.

Word	Noun	Adjective	Verb	Adverb
service entrance	Yes	No	No	No
entryway	Yes	No	No	No

As nouns, entryway is a hypernym of service entrance; that is, entryway is a word with a broader meaning than service entrance:

service entrance: an entrance intended for the use of servants or for delivery of goods and removal of refuse
entryway: something that provides access (to get in or get out)

Other hypernyms of service entrance include entrance, entranceway, entree, entry.

service entrance (noun)	entryway (noun)
an entrance intended for the use of servants or for delivery of goods and removal of refuse	something that provides access (to get in or get out)