Suicidal ideation is a common medical term for thoughts about suicide

Suicide

Suicide is the act of intentionally causing one's own death. Suicide is often committed out of despair or attributed to some underlying mental disorder, such as depression, bipolar disorder, schizophrenia, alcoholism, or drug abuse...

, which may be as detailed as a formulated plan, without the suicidal act itself. Although most people who undergo suicidal ideation do not commit suicide, some go on to make suicide attempts. The range of suicidal ideation varies greatly from fleeting to detailed planning, role playing and unsuccessful attempts, which may be deliberately constructed to fail or be discovered

Parasuicide

Parasuicide refers to suicide attempts or gestures and self-harm where there is no result in death. It is a non-fatal act in which a person deliberately causes injury to himself or ingests any prescribed or generally recognised therapeutic dose in excess...

, or may be fully intended to succeed.