boat vs yacht

boat and yacht both are nouns.

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

As verbs, yacht is a hyponym of boat; that is, yacht is a word with a more specific, narrower meaning than boat:

Other hyponyms of boat include motorboat, sail, row, canoe, kayak, paddle.

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

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