weapon of mass destruction vs W.M.D.

weapon of mass destruction and W.M.D. both are nouns.

Word	Noun	Adjective	Verb	Adverb
weapon of mass destruction	Yes	No	No	No
W.M.D.	Yes	No	No	No

As nouns, weapon of mass destruction and W.M.D. are synonyms defined as:

weapon of mass destruction and W.M.D.: a weapon that kills or injures civilian as well as military personnel (nuclear and chemical and biological weapons)

Other synonyms of weapon of mass destruction include WMD.

weapon of mass destruction (noun)	W.M.D. (noun)
a weapon that kills or injures civilian as well as military personnel (nuclear and chemical and biological weapons)	a weapon that kills or injures civilian as well as military personnel (nuclear and chemical and biological weapons)