tickle in WordNet English dictionary

1. feel sudden intense sensation or emotion
   "he was thrilled by the speed and the roar of the engine"
   thrill  tickle  vibrate 
   
2. touch or stroke lightly
   "The grass tickled her calves"
   tickle 
   
3. touch (a body part) lightly so as to excite the surface nerves and cause uneasiness, laughter, or spasmodic movements
   tickle  titillate  vellicate 
   

1. the act of tickling
   tickle  tickling  titillation 
   
2. a cutaneous sensation often resulting from light stroking
   tickle