weapon of mass destruction vs armed forces

weapon of mass destruction and armed forces both are nouns.

Word	Noun	Adjective	Verb	Adverb
weapon of mass destruction	Yes	No	No	No
armed forces	Yes	No	No	No

weapon of mass destruction (noun)	armed forces (noun)
a weapon that kills or injures civilian as well as military personnel (nuclear and chemical and biological weapons)	the military forces of a nation