sword vs cavalry sword

sword and cavalry sword both are nouns.

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

As nouns, cavalry sword is a hyponym of sword; that is, cavalry sword is a word with a more specific, narrower meaning than sword:

sword: a cutting or thrusting weapon that has a long metal blade and a hilt with a hand guard
cavalry sword: a stout sword with a curved blade and thick back

Other hyponyms of sword include backsword, broadsword, saber, sabre, cutlas, cutlass, falchion, fencing sword, rapier, tuck.

sword (noun)	cavalry sword (noun)
a cutting or thrusting weapon that has a long metal blade and a hilt with a hand guard	a stout sword with a curved blade and thick back