junky vs junkie

junky and junkie both are nouns.

Word	Noun	Adjective	Verb	Adverb
junky	Yes	No	No	No
junkie	Yes	No	No	No

As nouns, junky and junkie are synonyms defined as:

Other synonyms of junky include drug addict.

As nouns, junky and junkie are synonyms defined as:

junky and junkie: someone who is so ardently devoted to something that it resembles an addiction

Other synonyms of junky include addict, freak, nut.

junky (noun)	junkie (noun)
a narcotics addict	a narcotics addict
someone who is so ardently devoted to something that it resembles an addiction	someone who is so ardently devoted to something that it resembles an addiction