| expectancy(noun, worry, strain, anxiety, burden) |
| extension(noun, worry, strain, anxiety, burden) |
| extreme(noun, force, power, passion, strength) |
| extremity(noun, force, power, passion, strength) |
| fanaticism(noun, force, power, passion, strength) |
| fear(noun, worry, excitement, strain, anxiety) |
| fearfulness(noun, worry, strain, anxiety, burden) |
| ferment(noun, force, power, worry, passion) |
| ferociousness(noun, force, power, passion, strength) |
| ferocity(noun, force, power, passion, strength) |
| fervency(noun, force, power, passion, strength) |
| fervor(noun, force, power, passion, strength) |
| feverishness(noun, anxiety, agitation, nervousness, uneasiness) |
| fidgets(noun, anxiety, agitation, nervousness, uneasiness) |
| fierceness(noun, force, power, passion, strength) |
| fire(noun, force, power, passion, strength) |
| flutter(noun, worry, strain, anxiety, burden) |
| force(noun, power, worry, passion, strength) |
| forcefulness(noun, force, power, passion, strength) |
| fretfulness(noun, worry, strain, anxiety, stress) |