windjammer vs sailing ship

windjammer and sailing ship both are nouns.

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

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

windjammer: a large sailing ship
sailing ship: a vessel that is powered by the wind; often having several masts

Other hypernyms of windjammer include sailing vessel.

windjammer (noun)	sailing ship (noun)
a large sailing ship	a vessel that is powered by the wind; often having several masts