drill instructor vs noncom

drill instructor and noncom both are nouns.

Word	Noun	Adjective	Verb	Adverb
drill instructor	Yes	No	No	No
noncom	Yes	No	No	No

As nouns, noncom is a hypernym of drill instructor; that is, noncom is a word with a broader meaning than drill instructor:

drill instructor: a noncommissioned officer who instructs recruits in military marching and discipline
noncom: a military officer appointed from enlisted personnel

Other hypernyms of drill instructor include enlisted officer, noncommissioned officer.

drill instructor (noun)	noncom (noun)
a noncommissioned officer who instructs recruits in military marching and discipline	a military officer appointed from enlisted personnel