clang vs clangour

clang and clangour both are nouns.

Word	Noun	Adjective	Verb	Adverb
clang	Yes	No	Yes	No
clangour	Yes	No	Yes	No

As nouns, clang and clangour are synonyms defined as:

Other synonyms of clang include clangor, clangoring, clank, clash, crash.

clang (noun)	clangour (noun)
a loud resonant repeating noise	a loud resonant repeating noise

clang (verb)	clangour (verb)
make a loud noise	make a loud resonant noise