service door vs entryway

service door and entryway both are nouns.

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

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

service door: 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 door include entrance, entranceway, entree, entry.

service door (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)