aide vs aide-de-camp

aide and aide-de-camp both are nouns.

Word	Noun	Adjective	Verb	Adverb
aide	Yes	No	No	No
aide-de-camp	Yes	No	No	No

As nouns, aide and aide-de-camp are synonyms defined as:

aide and aide-de-camp: an officer who acts as military assistant to a more senior officer

Other synonyms of aide include adjutant.

aide (noun)	aide-de-camp (noun)
someone who acts as assistant	an officer who acts as military assistant to a more senior officer
an officer who acts as military assistant to a more senior officer