rapier vs sword

rapier and sword both are nouns.

Word	Noun	Adjective	Verb	Adverb
rapier	Yes	No	No	No
sword	Yes	No	No	No

As nouns, sword is a hypernym of rapier; that is, sword is a word with a broader meaning than rapier:

rapier: a straight sword with a narrow blade and two edges
sword: a cutting or thrusting weapon that has a long metal blade and a hilt with a hand guard

Other hypernyms of rapier include blade, brand, steel.

rapier (noun)	sword (noun)
a straight sword with a narrow blade and two edges	a cutting or thrusting weapon that has a long metal blade and a hilt with a hand guard