galley vs vessel

galley and vessel both are nouns.

Word	Noun	Adjective	Verb	Adverb
galley	Yes	No	No	No
vessel	Yes	No	No	No

As nouns, vessel is a hypernym of galley; that is, vessel is a word with a broader meaning than galley:

galley: (classical antiquity) a crescent-shaped seagoing vessel propelled by oars
vessel: a craft designed for water transportation

Other hypernyms of galley include watercraft.

As nouns, vessel is a hypernym of galley; that is, vessel is a word with a broader meaning than galley:

galley: a large medieval vessel with a single deck propelled by sails and oars with guns at stern and prow; a complement of 1,000 men; used mainly in the Mediterranean for war and trading
vessel: a craft designed for water transportation

Other hypernyms of galley include watercraft.

galley (noun)	vessel (noun)
the area for food preparation on a ship	a craft designed for water transportation
the kitchen area for food preparation on an airliner	an object used as a container (especially for liquids)
(classical antiquity) a crescent-shaped seagoing vessel propelled by oars	a tube in which a body fluid circulates
a large medieval vessel with a single deck propelled by sails and oars with guns at stern and prow; a complement of 1,000 men; used mainly in the Mediterranean for war and trading