dependent vs dependant

dependent and dependant both are nouns.

Word	Noun	Adjective	Verb	Adverb
dependent	Yes	Yes	No	No
dependant	Yes	Yes	No	No

As adjectives, dependent and dependant are synonyms defined as:

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

As adjectives, dependent and dependant are synonyms defined as:

Other synonyms of dependent include qualified.

As nouns, dependent and dependant are synonyms defined as:

dependent and dependant: a person who relies on another person for support (especially financial support)

dependent (noun)	dependant (noun)
a person who relies on another person for support (especially financial support)	a person who relies on another person for support (especially financial support)

dependent (adjective)	dependant (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	contingent on something else
addicted to a drug
contingent on something else
being under the power or sovereignty of another or others
held from above and hanging down