Failed
Part of speech: verb
Definition: To be unsuccessful.
Example sentence: I have not failed. I've just found 10,000 ways that won't work.
Failing
Part of speech: verb
Definition: To be unsuccessful.
Part of speech: noun
Definition: Weakness; defect
Part of speech: preposition
Definition: if the preferred or prior option is not possible
Example sentence: When you are offended at any man's fault, turn to yourself and study your own failings. Then you will forget your anger.