Afterlife
Part of speech: noun
Definition: Life after death. Later life.
Example sentence: I happen to believe that there is an afterlife.
Hereafter
Part of speech: adverb
Definition: In time to come; in some future time or state.From now on
Part of speech: noun
Definition: A future existence or state.Existence after death.
Example sentence: Every good act is charity. A man's true wealth hereafter is the good that he does in this world to his fellows.