Dependance vs Dependence – Which is Correct? - Two Minute English Dependence is the correct word to use when referring to the state of relying on or needing someone or something for support or help “Dependance” is a less common variant and is rarely used in modern English, especially in American English For example, you might say, “Many people have a dependence on caffeine to start their day ”
DEPENDENCY definition and meaning | Collins English Dictionary You talk about someone's dependency when they have a deep emotional, physical, or financial need for a particular person or thing, especially one that you consider excessive or undesirable