sick call vs military formation

sick call and military formation both are nouns.

Word	Noun	Adjective	Verb	Adverb
sick call	Yes	No	No	No
military formation	Yes	No	No	No

As nouns, military formation is a hypernym of sick call; that is, military formation is a word with a broader meaning than sick call:

sick call: the daily military formation at which individuals report to the medical officer as sick
military formation: a formation of troops

sick call (noun)	military formation (noun)
the daily military formation at which individuals report to the medical officer as sick	a formation of troops