drug addiction vs white plague

drug addiction and white plague both are nouns.

Word	Noun	Adjective	Verb	Adverb
drug addiction	Yes	No	No	No
white plague	Yes	No	No	No

As nouns, drug addiction and white plague are synonyms defined as:

drug addiction and white plague: an addiction to a drug (especially a narcotic drug)

drug addiction (noun)	white plague (noun)
an addiction to a drug (especially a narcotic drug)	involving the lungs with progressive wasting of the body
	an addiction to a drug (especially a narcotic drug)