dependent vs drug-addicted

dependent is a noun but drug-addicted is not a noun.

Word	Noun	Adjective	Verb	Adverb
dependent	Yes	Yes	No	No
drug-addicted	No	Yes	No	No

As adjectives, dependent and drug-addicted are synonyms defined as:

Other synonyms of dependent include dependant, hooked, strung-out.

dependent (noun)	drug-addicted (noun)
a person who relies on another person for support (especially financial support)

dependent (adjective)	drug-addicted (adjective)
relying on or requiring a person or thing for support, supply, or what is needed	addicted to a drug
(of a clause) unable to stand alone syntactically as a complete sentence
addicted to a drug
contingent on something else
being under the power or sovereignty of another or others
held from above and hanging down