Gollum says only one word outside of The Ten Thousand (contrast his mouth-and-throat noises and his sibilance), and that is “hasty”.  I am amused to note that each person who hears it then says it to someone else, if only for a short run.

• 05.081 We can’t go up the tunnels so hasty. (Gollum to Bilbo)
• 16.033 Don’t be so hasty! (Bilbo to Bard)
• 17.029 Not so hasty! (Bard to Thorin)

“Haste” in all of its forms presents itself more and more frequently as the action of the book increases pace, culminating in seven occurrences in Chapter 17.  It signifies the intensification of action, so I have tagged it “high’.

• 05.050 haste!’ said Gollum,
• 05.082 We can’t go up the tunnels so hasty.
• 05.118 and make haste.
• 05.118 Make haste!’
• 08.102 run hastily backwards
• 09.003 The king had ordered them to make haste.
• 09.061 in haste from the king’s great doors.
• 10.027 Now make haste
• 13.047 From here it hastens to the Gate.
• 14.042 he hastened now down the river to the Long Lake.
• 15.021 Bid him hasten!’
• 15.040 Come haste! Come haste! across the waste!
• 15.040 Come haste! Come haste! across the waste!
• 16.005 and snow is hastening behind them.
• 16.033 Don’t be so hasty!
• 17.028 but if you do not hasten,
• 17.029 Not so hasty!
• 17.031 and was now hastening to Dale.
• 17.033 We are hastening to our kinsmen
• 17.035 and they hastened back
• 17.044 and they hastened night after night through the mountains,