1. [n]  rushing about hastily in an undignified way
2. [v]  to move about or proceed hurriedly; "so terrified by the extraordinary ebbing of the sea that they scurried to higher ground."

SCAMPER is a 7 letter word that starts with S.

1. \Scam"per\, v. i. [imp. & p. p. {Scampered}; p. pr. &
   vb. n. {Scampering}.] [OF. escamper to escape, to save one's
   self; L. ex from + campus the field (sc. of battle). See
   {Camp}, and cf. {Decamp}, {Scamp}, n., {Shamble}, v. t.]
   To run with speed; to run or move in a quick, hurried manner;
   to hasten away. --Macaulay.
   
         The lady, however, . . . could not help scampering
         about the room after a mouse.            --S. Sharpe.
   
   

2. \Scam"per\, n.
   A scampering; a hasty flight.