task·mas·ter 
(tăskmăs′tər)
(tăskmăs′tər)n.
A person who regularly imposes difficult or demanding tasks.
- Stromboli
- strong
- strong-arm
- strongbox
- strong breeze
- strong force
- strong gale
- stronghold
- strong interaction
- strongish
- strongly
- strongman
- strong-minded
- strong-mindedly
- strong-mindedness
- strong nuclear force
- strongpoint
- strong room
- strongroom
- strong safety
- strong side
- strong suit
- strongyle
- strongyloidiasis
- strontianite