ex·ci·tor 
(ĭk-sītər)
(ĭk-sītər)n.
A nerve whose stimulation induces an increase in activity of the part it supplies.
- preservation
- preservationism
- preservationist
- preservative
- preserve
- preserver
- preset
- presettable
- preshrunk
- pre-shrunk
- preside
- presidency
- president
- president-elect
- presidential
- presidentially
- president pro tem
- president pro tempore
- President's Day
- Presidents' Day
- Presidents Day
- presidentship
- presider
- presidial
- presidiary