Intentional
Part of speech: adjective
Definition: Intended or planned; done deliberately or voluntarily. Done with intent.
Example sentence: I agree that my single-minded approach was a failing in life, but if I upset people, it was never intentional - it was just the unfortunate result of a burning desire to get the best out of myself and achieve as much as possible.
Willful
Part of speech: adjective
Definition: Done in a manner which was intended.Intentional.Stubborn.
Example sentence: To play is to act out and be willful, exultant and committed, as if one is assured of one's prospects.