dope vs low-down

dope and low-down both are nouns.

Word	Noun	Adjective	Verb	Adverb
dope	Yes	No	Yes	No
low-down	Yes	Yes	No	No

As nouns, dope and low-down are synonyms defined as:

Other synonyms of dope include poop, the skinny.

dope (noun)	low-down (noun)
street names for marijuana	slang terms for inside information
slang terms for inside information
carbonated drink flavored with extract from kola nuts
an ignorant or foolish person

dope (adjective)	low-down (adjective)
	of the most contemptible kind
	(of jazz) having the soulful feeling of early blues

dope (verb)	low-down (verb)
give a narcotic to
add impurities to (a semiconductor) in order to produce or modify its properties
take drugs to improve one's athletic performance