militia vs reserves

militia and reserves both are nouns.

Word	Noun	Adjective	Verb	Adverb
militia	Yes	No	No	No
reserves	Yes	No	No	No

As nouns, militia and reserves are synonyms defined as:

militia and reserves: civilians trained as soldiers but not part of the regular army

militia (noun)	reserves (noun)
civilians trained as soldiers but not part of the regular army	civilians trained as soldiers but not part of the regular army
the entire body of physically fit civilians eligible by law for military service