military machine vs bomber

military machine and bomber both are nouns.

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

military machine (noun)	bomber (noun)
the military forces of a nation	a military aircraft that drops bombs during flight
	a large sandwich made of a long crusty roll split lengthwise and filled with meats and cheese (and tomato and onion and lettuce and condiments); different names are used in different sections of the United States
	a person who plants bombs