steel vs broadsword

steel and broadsword both are nouns.

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

As nouns, broadsword is a hyponym of steel; that is, broadsword 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
broadsword: a sword with a broad blade and (usually) two cutting edges; used to cut rather than stab

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

steel (noun)	broadsword (noun)
knife sharpener consisting of a ridged steel rod	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
an alloy of iron with small amounts of carbon; widely used in construction; mechanical properties can be varied over a wide range

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