Crusader (Noun)

A disputant who advocates reform.

Nouns denoting people.

She was a crusader for women's rights, dedicating her life to fighting for equality and justice.
As a vocal critic of government corruption, he became a crusader for transparency and accountability.
The environmental activist was a crusader for sustainable practices, working tirelessly to raise awareness about climate change.
The whistleblower was a crusader for corporate responsibility, exposing the company's unethical business practices to the public.
The journalist was a crusader for freedom of the press, fighting against censorship and government control of the media.

A warrior who engages in a holy war; "the Crusaders tried to recapture the Holy Land from the Muslims".

Nouns denoting people.