clumping vs clopping

clumping and clopping both are nouns.

Word	Noun	Adjective	Verb	Adverb
clumping	Yes	No	No	No
clopping	Yes	No	No	No

As nouns, clumping and clopping are synonyms defined as:

clumping and clopping: the sound of a horse's hoofs hitting on a hard surface

Other synonyms of clumping include clip-clop, clippety-clop, clop, clunking.

clumping (noun)	clopping (noun)
the sound of a horse's hoofs hitting on a hard surface	the sound of a horse's hoofs hitting on a hard surface