scimitar vs cavalry sword

scimitar and cavalry sword both are nouns.

Word	Noun	Adjective	Verb	Adverb
scimitar	Yes	No	No	No
cavalry sword	Yes	No	No	No

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

scimitar: a curved oriental saber; the edge is on the convex side of the blade
cavalry sword: a stout sword with a curved blade and thick back

Other hypernyms of scimitar include saber, sabre.

scimitar (noun)	cavalry sword (noun)
a curved oriental saber; the edge is on the convex side of the blade	a stout sword with a curved blade and thick back