aide vs assistant

aide and assistant both are nouns.

Word	Noun	Adjective	Verb	Adverb
aide	Yes	No	No	No
assistant	Yes	Yes	No	No

As nouns, assistant is a hypernym of aide; that is, assistant is a word with a broader meaning than aide:

aide: someone who acts as assistant
assistant: a person who contributes to the fulfillment of a need or furtherance of an effort or purpose

Other hypernyms of aide include help, helper, supporter.

aide (noun)	assistant (noun)
someone who acts as assistant	a person who contributes to the fulfillment of a need or furtherance of an effort or purpose
an officer who acts as military assistant to a more senior officer

aide (adjective)	assistant (adjective)
	of or relating to a person who is subordinate to another