broadsword vs sword

broadsword and sword both are nouns.

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

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

broadsword: a sword with a broad blade and (usually) two cutting edges; used to cut rather than stab
sword: a cutting or thrusting weapon that has a long metal blade and a hilt with a hand guard

Other hypernyms of broadsword include blade, brand, steel.

broadsword (noun)	sword (noun)
a sword with a broad blade and (usually) two cutting edges; used to cut rather than stab	a cutting or thrusting weapon that has a long metal blade and a hilt with a hand guard