1.
supporter; backer; advocate
A person who supports a political figure, party, cause, or idea. Often used in political and social contexts.
Related Words
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支持 (support)
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応援者 (cheerleader, supporter)
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賛同者 (endorser)
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賛成者 (supporter)
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支援者 (supporter)
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擁護者 (advocate)
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党員 (party member)