racing yacht vs vessel

racing yacht and vessel both are nouns.

Word	Noun	Adjective	Verb	Adverb
racing yacht	Yes	No	No	No
vessel	Yes	No	No	No

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

racing yacht: an expensive vessel propelled by sail or power and used for cruising or racing
vessel: a craft designed for water transportation

Other hypernyms of racing yacht include watercraft.

racing yacht (noun)	vessel (noun)
an expensive vessel propelled by sail or power and used for cruising or racing	a craft designed for water transportation
	an object used as a container (especially for liquids)
	a tube in which a body fluid circulates