WMD vs weapon of mass destruction

WMD and weapon of mass destruction both are nouns.

Word	Noun	Adjective	Verb	Adverb
WMD	Yes	No	No	No
weapon of mass destruction	Yes	No	No	No

As nouns, WMD and weapon of mass destruction are synonyms defined as:

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

Other synonyms of WMD include W.M.D..

WMD (noun)	weapon of mass destruction (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)