Synonyms of 'firebrand'
rabble-rouserDictionary, activist, incendiaryhis reputation as a young firebrand
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If you describe someone involved in politics as an agitator, you disapprove of them because of the trouble they cause in organizing campaigns and protests.
a famous actress who was accused of being a political agitator
If you say that someone such as a politician is a demagogue you are criticizing them because you think they try to win people's support by appealing to their emotions rather than using reasonable arguments.
He was dismissed as a radical demagogue.
Thesaurus for firebrand from the Collins English Thesaurus
If you describe someone as a firebrand , especially someone who is very active in politics , you mean that they are always trying to make people take strong action.