musketeer vs marcher

musketeer and marcher both are nouns.

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

As nouns, marcher is a hypernym of musketeer; that is, marcher is a word with a broader meaning than musketeer:

Other hypernyms of musketeer include foot soldier, footslogger, infantryman.

musketeer (noun)	marcher (noun)
a foot soldier armed with a musket	fights on foot with small arms
	walks with regular or stately step
	an inhabitant of a border district