corkage vs service charge

corkage and service charge both are nouns.

Word	Noun	Adjective	Verb	Adverb
corkage	Yes	No	No	No
service charge	Yes	No	No	No

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

corkage: a charge added at a restaurant for every bottle of wine served that was not bought on the premises
service charge: a percentage of a bill (as at a hotel or restaurant) added in payment for service

Other hypernyms of corkage include service fee.

corkage (noun)	service charge (noun)
a charge added at a restaurant for every bottle of wine served that was not bought on the premises	a percentage of a bill (as at a hotel or restaurant) added in payment for service
	a charge paid to the owner of an apartment building for electricity, lifts, maintenance, etc.