champion

CHAMPION noun

[ C ] uk/ˈtʃæmpiən/ us champion noun [C]
(SUPPORT)

someone who supports, defends, or fights for a person, belief, or principle

защитник, поборник
a champion of human rights Смотрите такжеreigning champion
champion verb [ T ] uk/ˈtʃæmpiən/ us
to support, defend, or fight for a person, belief, or principle

защищать, отстаивать
She champion ed the cause of free speech.