sailing vessel vs vessel

sailing vessel and vessel both are nouns.

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

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

sailing vessel: a vessel that is powered by the wind; often having several masts
vessel: a craft designed for water transportation

Other hypernyms of sailing vessel include watercraft.

sailing vessel (noun)	vessel (noun)
a vessel that is powered by the wind; often having several masts	a craft designed for water transportation
	an object used as a container (especially for liquids)
	a tube in which a body fluid circulates