grenadier vs footslogger

grenadier and footslogger both are nouns.

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

As nouns, footslogger is a hypernym of grenadier; that is, footslogger is a word with a broader meaning than grenadier:

Other hypernyms of grenadier include foot soldier, infantryman, marcher.

grenadier (noun)	footslogger (noun)
deep-sea fish with a large head and body and long tapering tail	fights on foot with small arms
an infantryman equipped with grenades