Changer

1. n. One apt to change; an inconstant person.
2. n. One who changes or alters the form of anything.
3. n. One who deals in or changes money.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.