RichThesaurus
pitter-patter
vs
thudding
pitter-patter
noun
A soft, percussive sound, as of tiny feet, or of rain on a rooftop.
thudding
noun
A dull banging sound; a thud.
How often have the words
pitter-patter
and
thudding
occurred in a corpus of books?
(source:
Google Ngram Viewer
)