clamor, clamour

1. VERB

If people are clamouring for something, they are demanding it in a noisy or angry way. [JOURNALISM]

• competing parties clamouring for the attention of the voter. 
• At breakfast next morning my two grandsons were clamouring to go swimming.
• N-SING : oft N for n.   
  the clamour for his resignation.

... Cobuild

v.intr.

1. To make a loud sustained noise or outcry.

2. To make insistent demands or complaints: clamored for tax reforms.

v.tr.

1. To exclaim insistently and noisily: The representatives clamored their disapproval.

2. To influence or force by clamoring: clamored the mayor into resigning.

... Am-Heritage