There isn't a common four-letter word for "chocoladefabrikant" (chocolate maker) in Dutch.
However, here are some options depending on the context of your puzzle:
Fabr. (abbreviation for Fabriek - factory) - This might be used informally or in a crossword clue.
Maker - This is a more generic term for someone who makes something, but it could work depending on the puzzle.
If you're looking for a more descriptive term that uses four letters, you might consider:
- Choco (informal term for chocolate) - This could be used creatively in a puzzle.