| faltering(noun, delay, difficulty, anxiety, weakness) |
| feeling(noun, guess, hunch, instinct) |
| ferment(noun, worry, strain, anxiety, burden) |
| fidgets(noun, trouble, worry, concern, anxiety) |
| flap(noun, trouble, worry, concern, anxiety) |
| fluctuate(verb, dispute, challenge, doubt, question) |
| fluctuation(noun, delay, weakness, doubt, uncertainty) |
| flutter(noun, worry, strain, anxiety, burden) |
| force(noun, worry, strain, anxiety, burden) |
| fretfulness(noun, trouble, worry, concern, anxiety) |
| fumbling(noun, delay, weakness, doubt, uncertainty) |
| fuss(noun, trouble, worry, concern, anxiety) |
| give no credence(expression, idiom, dispute, challenge, doubt) |
| give no credence to(verb, expression, idiom, doubt, question) |
| goose bumps(noun, expression, trouble, worry, concern) |
| greet with skepticism(expression, idiom) |
| guess(noun, verb, think, doubt, uncertainty) |
| guesswork(noun, trouble, concern, anxiety, confusion) |
| gut feeling(noun, expression, doubt, uncertainty, impression) |
| half-belief |