marcher vs grenadier

marcher and grenadier both are nouns.

Word	Noun	Adjective	Verb	Adverb
marcher	Yes	No	No	No
grenadier	Yes	No	No	No

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

Other hyponyms of marcher include fusilier, grenade thrower, doughboy, musketeer.

marcher (noun)	grenadier (noun)
fights on foot with small arms	deep-sea fish with a large head and body and long tapering tail
walks with regular or stately step	an infantryman equipped with grenades
an inhabitant of a border district