military machine vs infiltration

military machine and infiltration both are nouns.

Word	Noun	Adjective	Verb	Adverb
military machine	Yes	No	No	No
infiltration	Yes	No	No	No

military machine (noun)	infiltration (noun)
the military forces of a nation	a process in which individuals (or small groups) penetrate an area (especially the military penetration of enemy positions without detection)
	the slow passage of a liquid through a filtering medium