yacht vs boat

yacht and boat both are nouns.

Word	Noun	Adjective	Verb	Adverb
yacht	Yes	No	Yes	No
boat	Yes	No	Yes	No

As verbs, boat is a hypernym of yacht; that is, boat is a word with a broader meaning than yacht:

yacht (noun)	boat (noun)
an expensive vessel propelled by sail or power and used for cruising or racing	a small vessel for travel on water
	a dish (often boat-shaped) for serving gravy or sauce

yacht (verb)	boat (verb)
travel in a yacht	ride in a boat on water