How to Say "campaigner" in Spanish
The most common Spanish word for “campaigner” is “activista” — use 'activista' for someone who is actively involved in social or political movements and campaigns for change.
activista
ak-tee-bees-tahak.tiˈβis.ta

Examples
Ella es una activista muy conocida en su ciudad.
She is a very well-known activist in her city.
Los activistas ambientales están pidiendo nuevas leyes.
Environmental activists are asking for new laws.
Trabajar como activista de derechos humanos requiere mucha valentía.
Working as a human rights activist requires a lot of courage.
One word for both genders
The word 'activista' is the same for both men and women. You only change the word 'the' or 'a' in front of it (el activista vs. la activista).
Matching your adjectives
Even though the word 'activista' always ends in -a, any describing words used with it must match the person's real gender. For example: 'el activista compromeTIDO' (male) but 'la activista compromeTIDA' (female).
The 'Activisto' Error
Mistake: “El activisto está aquí.”
Correction: El activista está aquí. Words ending in -ista never change to -o for men.
cruzado
kroo-SAH-dohkruˈsaðo

Examples
Ricardo Corazón de León fue uno de los famosos cruzados.
Richard the Lionheart was one of the famous crusaders.
Los cruzados marcharon hacia Oriente Medio en el siglo XII.
The crusaders marched toward the Middle East in the 12th century.
Feminine Form
The female equivalent is 'cruzada' (the woman) or 'la Cruzada' (the event, the Crusade itself).
Activista vs. Cruzado
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