Discomfit
Else clues• Annoy
• Blow the cool of
• Bother
• Confound
• Daunt
• Discombobulate
• Disconcert
• Disconcert: Colloq.
• Dismay
• Disorient
• Disturb: Colloq.
• Embarrass
• Floor
• Fluster
• Get to
• Give pause to
• Have an effect on
• Nonplus
• Perturb
• Rattle
• Shake up
• Stun
• Throw
• Throw for a loop
• Unnerve
• Unsettle