military vs field day

military and field day both are nouns.

Word	Noun	Adjective	Verb	Adverb
military	Yes	Yes	No	No
field day	Yes	No	No	No

military (noun)	field day (noun)
the military forces of a nation	a day for outdoor athletic competition
	a day devoted to an outdoor social gathering
	(military) a day for military exercises and display
	a time of unusual pleasure and success

military (adjective)	field day (adjective)
associated with or performed by members of the armed services as contrasted with civilians
characteristic of or associated with soldiers or the military
of or relating to the study of the principles of warfare