clangor vs clangour

clangor and clangour both are nouns.

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

As nouns, clangor and clangour are synonyms defined as:

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

As verbs, clangor and clangour are synonyms defined as:

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

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