reservist vs soldier

reservist and soldier both are nouns.

Word	Noun	Adjective	Verb	Adverb
reservist	Yes	No	No	No
soldier	Yes	No	Yes	No

As nouns, soldier is a hypernym of reservist; that is, soldier is a word with a broader meaning than reservist:

reservist (noun)	soldier (noun)
a member of a military reserve	a wingless sterile ant or termite having a large head and powerful jaws adapted for defending the colony
	an enlisted man or woman who serves in an army

reservist (verb)	soldier (verb)
	serve as a soldier in the military