Having a killer instinct and Self-willed

Self-willed and having a killer instinct are semantically related. In some cases you can use "Self-willed" instead an adjective phrase "Having a killer instinct".

Self-willed adjective - Sticking to an opinion, purpose, or course of action in spite of reason, arguments, or persuasion.

Having a killer instinct and self-willed are semantically related. Sometimes you can use "Having a killer instinct" instead an adjective phrase "Self-willed".