Invincible - Live a normal life span, can get hurt, but won’t be killed, still feel things
Immortal - Live forever (stop aging in your mid30s) still capable of being injured and dying via unnatural causes
Invulnerable - Live a normal life span, can’t get hurt or killed, but in return can’t feel anything (emotionally or physically)
Took a little liberty with some of the definitions to provide enough separation for the question.
Always immortal if there is a permanent opt out like Aragorn.