strung-out vs dependant

strung-out is not a noun while dependant is a noun.

Word	Noun	Adjective	Verb	Adverb
strung-out	No	Yes	No	No
dependant	Yes	Yes	No	No

As adjectives, strung-out and dependant are synonyms defined as:

Other synonyms of strung-out include dependent, drug-addicted, hooked.

strung-out (noun)	dependant (noun)
	a person who relies on another person for support (especially financial support)

strung-out (adjective)	dependant (adjective)
addicted to a drug	addicted to a drug
	contingent on something else