stres·sor 
(strĕsər)
(strĕsər)n.
An agent, condition, or other stimulus that causes stress to an organism.
- Philadelphia lawyer
- Philadelphian
- Philadelphia pepper pot
- Philae
- philander
- philanderer
- philanthropic
- philanthropical
- philanthropically
- philanthropist
- philanthropy
- philatelic
- philatelical
- philatelically
- philatelist
- philately
- -phile
- Philemon
- Philemon
- philharmonic
- philhellene
- philhellenic
- philhellenism
- philhellenist
- Phil. I.