sailing vessel vs dandy

sailing vessel and dandy both are nouns.

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

As nouns, dandy is a hyponym of sailing vessel; that is, dandy is a word with a more specific, narrower meaning than sailing vessel:

sailing vessel: a vessel that is powered by the wind; often having several masts
dandy: a sailing vessel with two masts; a small mizzen is aft of the rudderpost

sailing vessel (noun)	dandy (noun)
a vessel that is powered by the wind; often having several masts	a sailing vessel with two masts; a small mizzen is aft of the rudderpost
	a man who is much concerned with his dress and appearance

sailing vessel (adjective)	dandy (adjective)
	excellent