n. Agent noun of proselytize; one who proselytizes.
the GNU version of the Collaborative International Dictionary of English
n. One who proselytes.
The Century Dictionary and Cyclopedia
n. One who makes or endeavors to make proselytes. Also spelled proselytiser.
Word Usage
"This has largely shielded Christian-affiliated groups from being targeted over religion, but both the Taliban and politicians have tried recently to pin the "proselytizer" label on such foreigners."