compulsion

(noun) an urge to do or say something that might be better left undone or unsaid. Synonyms: irresistible impulse. Example: "He felt a compulsion to babble on about the accident."

(noun) an irrational motive for performing trivial or repetitive actions, even against your will. Synonyms: obsession. Example: "Her compulsion to wash her hands repeatedly."

(noun) using force to cause something to occur. Synonyms: coercion. Examples: "Though pressed into rugby under compulsion i began to enjoy the game." "They didn't have to use coercion."