activist

ac*tiv*ist

noun

{bc}one who advocates or practices {d_link|activism|activism} {bc}a person who uses or supports strong actions (such as public protests) in support of or opposition to one side of a controversial issue

activist

adjective

{bc}advocating or practicing {d_link|activism|activism} {bc}using or supporting strong actions in support of or opposition to one side of a controversial issue