junior vs subaltern

junior and subaltern both are nouns.

Word	Noun	Adjective	Verb	Adverb
junior	Yes	Yes	No	No
subaltern	Yes	Yes	No	No

junior (noun)	subaltern (noun)
the younger of two persons	a British commissioned army officer below the rank of captain
a third-year undergraduate
term of address for a disrespectful and annoying male

junior (adjective)	subaltern (adjective)
younger; lower in rank; shorter in length of tenure or service	inferior in rank or status
used of the third or next to final year in United States high school or college
including or intended for youthful persons