Clitter
"Clitter" in a Sentence (2 examples)
Howard […] was even more aware of something else. A clittering sound. It was coming from behind him, and it was getting closer.
A ‘clitter’ or ‘clatter’ is a mass of boulders: it may be in the nature of a scree at the foot of the parent rock, or it may be more or less far removed from any rock exposure to which its origin can be directly attributed.