patter in WordNet English dictionary

1. plausible glib talk (especially useful to a salesperson)
   spiel  patter  line of gab 
   
2. a quick succession of light rapid sounds
   "the patter of mice"; "the patter of tiny feet"
   patter 
   

1. make light, rapid and repeated sounds
   "gently pattering rain"
   patter  pitter-patter 
   
2. rain gently
   "It has only sprinkled, but the roads are slick"
   sprinkle  spit  spatter  patter  pitter-patter