Examples from the Web for sympathizer
The president considered “Lucky Lindy,” as he was derisively called, a Nazi sympathizer and a subversive.
A partizan of the man she hated, or a sympathizer with this stranger who had already given her too much joy?The City of Delight|Elizabeth Miller
And this is the cousin from across the sea who bids fair to become our more than sympathizer?Peggy Owen Patriot|Lucy Foster Madison
How were they to distinguish a neutral or a sympathizer from their foes?Romantic Spain|John Augustus O'Shea
Word Origin and History for sympathizer
1815, agent noun from sympathize.