blade vs falchion

blade and falchion both are nouns.

Word	Noun	Adjective	Verb	Adverb
blade	Yes	No	No	No
falchion	Yes	No	No	No

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

blade: a cutting or thrusting weapon that has a long metal blade and a hilt with a hand guard
falchion: a short broad slightly convex medieval sword with a sharp point

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

blade (noun)	falchion (noun)
the flat part of a tool or weapon that (usually) has a cutting edge	a short broad slightly convex medieval sword with a sharp point
a cutting or thrusting weapon that has a long metal blade and a hilt with a hand guard
flat surface that rotates and pushes against air or water
the part of the skate that slides on the ice
a broad flat body part (as of the shoulder or tongue)
a cut of beef from the shoulder blade
something long and thin resembling a blade of grass
a dashing young man
especially a leaf of grass or the broad portion of a leaf as distinct from the petiole