Two most powerful postfix letters

What are the two most powerful letters that can be added to a behaviorally related “root word” that will convert a “behavior” into a “tool?”

The Answer:   E R

Example:
ACTION WORDS        TOOLS

Hold   + add E R   =  Holder
Stamp  + add E R =  Stamper
Watch                           Watcher
Clean                            Cleaner
Wash                            washer
Build                            builder
Fix                                fixer
Warm                           warmer
Charge                         charger
Find                              finder

There are hundreds of examples, but hope this makes sense. If this sounds all too complicated. It’s not! You can use Wordtracker to research powerful “action words” to discover what tools are hottest in the marketplace.