dandy vs sailing ship

dandy and sailing ship both are nouns.

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

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

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

Other hypernyms of dandy include sailing vessel.

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

dandy (adjective)	sailing ship (adjective)
excellent