gorilla / guerrilla [gəˈrɪlə]
gorilla – n. – 1. the large anthropoid ape, Gorilla gorilla, native to central Africa, having a large head, short neck and prominent mouth; 2. a heavily built man of aggressive demeanour
guerrilla – n. – 1. a person taking part in an irregular war waged by small bands operating independently, often against a stronger, more organized force, with surprise attacks, etc.; 2. informal an activist using controversial or sensational means to support a cause