Past
Part of speech: adverb
Definition: in a direction that passes
Part of speech: preposition
Definition: beyond in place, quantity or time
Part of speech: noun
Definition: The period of time that has already happened, in contrast to the present and the future. The past tense.
Part of speech: adjective
Definition: Having already happened; in the past; finished. Relating to the past. (of a period of time) the one before this one
Example sentence: The past cannot be changed. The future is yet in your power.
Former
Part of speech: noun
Definition: Someone who forms something.Someone in, or of, a certain form (class).
Part of speech: adjective
Definition: Previous.First of a list of two items.
Example sentence: There is nothing noble in being superior to your fellow men. True nobility lies in being superior to your former self.