sailboat vs sailing ship

sailboat and sailing ship both are nouns.

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

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

sailboat: a small sailing vessel; usually with a single mast
sailing ship: a vessel that is powered by the wind; often having several masts

Other hypernyms of sailboat include sailing vessel.

sailboat (noun)	sailing ship (noun)
a small sailing vessel; usually with a single mast	a vessel that is powered by the wind; often having several masts