steel vs cavalry sword

steel and cavalry sword both are nouns.

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

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

steel: 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 steel include backsword, broadsword, saber, sabre, cutlas, cutlass, falchion, fencing sword, rapier, tuck.

steel (noun)	cavalry sword (noun)
knife sharpener consisting of a ridged steel rod	a stout sword with a curved blade and thick back
a cutting or thrusting weapon that has a long metal blade and a hilt with a hand guard
an alloy of iron with small amounts of carbon; widely used in construction; mechanical properties can be varied over a wide range

steel (verb)	cavalry sword (verb)
cover, plate, or edge with steel
get ready for something difficult or unpleasant