Loneliness vs Depression. Do you think there's a difference between these two? And do you think there's a definite cure for them both?

I realise that this is a question that might trigger a lot of people so apologies in advance. Keep in mind that I just want to hear your thoughts in spirit of teaching me something new. That's why I ask these questions.
Loneliness vs Depression. Do you think there's a difference between these two? And do you think there's a definite cure for them both?
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